Home / 15,438.79-21,305.58-8,365.19

Finding the Fourth Proportional to 15,438.79, 21,305.58 and 8,365.19

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Solution

The fourth proportional to 15,438.79, 21,305.58 and 8,365.19 is: 11,543.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.79 : 21,305.58 = 8,365.19 : x
  2. Step 2: Convert to fraction form
    15,438.79/21,305.58 = 8,365.19/x
  3. Step 3: Cross multiply
    15,438.79x = 21,305.58 × 8,365.19
  4. Step 4: Simplify right side
    15,438.79x = 178,225,224.76
  5. Step 5: Solve for x
    x = 178,225,224.76/15,438.79
  6. Step 6: Final answer
    x = 11,543.99

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Half scale
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Double scale
Find fourth proportional to 15,439.79, 21,306.96 and 8,366.19
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.