Home / 58,221.90-87,351.31-20,781.15

Finding the Fourth Proportional to 58,221.90, 87,351.31 and 20,781.15

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Solution

The fourth proportional to 58,221.90, 87,351.31 and 20,781.15 is: 31,178.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,221.90 : 87,351.31 = 20,781.15 : x
  2. Step 2: Convert to fraction form
    58,221.90/87,351.31 = 20,781.15/x
  3. Step 3: Cross multiply
    58,221.90x = 87,351.31 × 20,781.15
  4. Step 4: Simplify right side
    58,221.90x = 1,815,260,296.29
  5. Step 5: Solve for x
    x = 1,815,260,296.29/58,221.90
  6. Step 6: Final answer
    x = 31,178.31

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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.