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Finding the Fourth Proportional to 40,390.67, 55,739.10 and 22,489.91

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Solution

The fourth proportional to 40,390.67, 55,739.10 and 22,489.91 is: 31,036.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,390.67 : 55,739.10 = 22,489.91 : x
  2. Step 2: Convert to fraction form
    40,390.67/55,739.10 = 22,489.91/x
  3. Step 3: Cross multiply
    40,390.67x = 55,739.10 × 22,489.91
  4. Step 4: Simplify right side
    40,390.67x = 1,253,567,063.79
  5. Step 5: Solve for x
    x = 1,253,567,063.79/40,390.67
  6. Step 6: Final answer
    x = 31,036.06

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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.