Home / 15,434.51-21,291.80-9,759.69

Finding the Fourth Proportional to 15,434.51, 21,291.80 and 9,759.69

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Solution

The fourth proportional to 15,434.51, 21,291.80 and 9,759.69 is: 13,463.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,434.51 : 21,291.80 = 9,759.69 : x
  2. Step 2: Convert to fraction form
    15,434.51/21,291.80 = 9,759.69/x
  3. Step 3: Cross multiply
    15,434.51x = 21,291.80 × 9,759.69
  4. Step 4: Simplify right side
    15,434.51x = 207,801,318.74
  5. Step 5: Solve for x
    x = 207,801,318.74/15,434.51
  6. Step 6: Final answer
    x = 13,463.43

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Half scale
Find fourth proportional to 30,869.01, 42,583.59 and 19,519.38
Double scale
Find fourth proportional to 15,435.51, 21,293.17 and 9,760.69
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.