Home / 31,781.13-47,656.89-11,789.82

Finding the Fourth Proportional to 31,781.13, 47,656.89 and 11,789.82

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Solution

The fourth proportional to 31,781.13, 47,656.89 and 11,789.82 is: 17,679.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,781.13 : 47,656.89 = 11,789.82 : x
  2. Step 2: Convert to fraction form
    31,781.13/47,656.89 = 11,789.82/x
  3. Step 3: Cross multiply
    31,781.13x = 47,656.89 × 11,789.82
  4. Step 4: Simplify right side
    31,781.13x = 561,866,154.86
  5. Step 5: Solve for x
    x = 561,866,154.86/31,781.13
  6. Step 6: Final answer
    x = 17,679.24

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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.