Home / 15,726.66-21,711.78-10,428.69

Finding the Fourth Proportional to 15,726.66, 21,711.78 and 10,428.69

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Solution

The fourth proportional to 15,726.66, 21,711.78 and 10,428.69 is: 14,397.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,726.66 : 21,711.78 = 10,428.69 : x
  2. Step 2: Convert to fraction form
    15,726.66/21,711.78 = 10,428.69/x
  3. Step 3: Cross multiply
    15,726.66x = 21,711.78 × 10,428.69
  4. Step 4: Simplify right side
    15,726.66x = 226,425,422.97
  5. Step 5: Solve for x
    x = 226,425,422.97/15,726.66
  6. Step 6: Final answer
    x = 14,397.55

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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.