Home / 15,303.53-21,113.56-9,638.75

Finding the Fourth Proportional to 15,303.53, 21,113.56 and 9,638.75

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Solution

The fourth proportional to 15,303.53, 21,113.56 and 9,638.75 is: 13,298.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,303.53 : 21,113.56 = 9,638.75 : x
  2. Step 2: Convert to fraction form
    15,303.53/21,113.56 = 9,638.75/x
  3. Step 3: Cross multiply
    15,303.53x = 21,113.56 × 9,638.75
  4. Step 4: Simplify right side
    15,303.53x = 203,508,326.45
  5. Step 5: Solve for x
    x = 203,508,326.45/15,303.53
  6. Step 6: Final answer
    x = 13,298.13

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Find fourth proportional to 7,651.77, 10,556.78 and 4,819.38
Half scale
Find fourth proportional to 30,607.06, 42,227.12 and 19,277.50
Double scale
Find fourth proportional to 15,304.53, 21,114.94 and 9,639.75
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.