Home / 21,542.31-29,727.90-13,158.81

Finding the Fourth Proportional to 21,542.31, 29,727.90 and 13,158.81

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Solution

The fourth proportional to 21,542.31, 29,727.90 and 13,158.81 is: 18,158.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,542.31 : 29,727.90 = 13,158.81 : x
  2. Step 2: Convert to fraction form
    21,542.31/29,727.90 = 13,158.81/x
  3. Step 3: Cross multiply
    21,542.31x = 29,727.90 × 13,158.81
  4. Step 4: Simplify right side
    21,542.31x = 391,183,787.80
  5. Step 5: Solve for x
    x = 391,183,787.80/21,542.31
  6. Step 6: Final answer
    x = 18,158.86

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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.