Home / 31,151.20-42,989.36-17,721.92

Finding the Fourth Proportional to 31,151.20, 42,989.36 and 17,721.92

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Solution

The fourth proportional to 31,151.20, 42,989.36 and 17,721.92 is: 24,456.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,151.20 : 42,989.36 = 17,721.92 : x
  2. Step 2: Convert to fraction form
    31,151.20/42,989.36 = 17,721.92/x
  3. Step 3: Cross multiply
    31,151.20x = 42,989.36 × 17,721.92
  4. Step 4: Simplify right side
    31,151.20x = 761,853,998.77
  5. Step 5: Solve for x
    x = 761,853,998.77/31,151.20
  6. Step 6: Final answer
    x = 24,456.65

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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.