Home / 31,418.68-47,125.20-18,854.38

Finding the Fourth Proportional to 31,418.68, 47,125.20 and 18,854.38

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Solution

The fourth proportional to 31,418.68, 47,125.20 and 18,854.38 is: 28,279.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,418.68 : 47,125.20 = 18,854.38 : x
  2. Step 2: Convert to fraction form
    31,418.68/47,125.20 = 18,854.38/x
  3. Step 3: Cross multiply
    31,418.68x = 47,125.20 × 18,854.38
  4. Step 4: Simplify right side
    31,418.68x = 888,516,428.38
  5. Step 5: Solve for x
    x = 888,516,428.38/31,418.68
  6. Step 6: Final answer
    x = 28,279.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.