Home / 28,434.97-39,239.31-15,688.18

Finding the Fourth Proportional to 28,434.97, 39,239.31 and 15,688.18

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Solution

The fourth proportional to 28,434.97, 39,239.31 and 15,688.18 is: 21,649.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,434.97 : 39,239.31 = 15,688.18 : x
  2. Step 2: Convert to fraction form
    28,434.97/39,239.31 = 15,688.18/x
  3. Step 3: Cross multiply
    28,434.97x = 39,239.31 × 15,688.18
  4. Step 4: Simplify right side
    28,434.97x = 615,593,358.36
  5. Step 5: Solve for x
    x = 615,593,358.36/28,434.97
  6. Step 6: Final answer
    x = 21,649.17

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Double scale
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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.