Home / 31,000.71-42,781.28-16,853.85

Finding the Fourth Proportional to 31,000.71, 42,781.28 and 16,853.85

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Solution

The fourth proportional to 31,000.71, 42,781.28 and 16,853.85 is: 23,258.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,000.71 : 42,781.28 = 16,853.85 : x
  2. Step 2: Convert to fraction form
    31,000.71/42,781.28 = 16,853.85/x
  3. Step 3: Cross multiply
    31,000.71x = 42,781.28 × 16,853.85
  4. Step 4: Simplify right side
    31,000.71x = 721,029,275.93
  5. Step 5: Solve for x
    x = 721,029,275.93/31,000.71
  6. Step 6: Final answer
    x = 23,258.48

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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.