Home / 54,500.15-81,781.28-21,215.90

Finding the Fourth Proportional to 54,500.15, 81,781.28 and 21,215.90

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Solution

The fourth proportional to 54,500.15, 81,781.28 and 21,215.90 is: 31,835.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,500.15 : 81,781.28 = 21,215.90 : x
  2. Step 2: Convert to fraction form
    54,500.15/81,781.28 = 21,215.90/x
  3. Step 3: Cross multiply
    54,500.15x = 81,781.28 × 21,215.90
  4. Step 4: Simplify right side
    54,500.15x = 1,735,063,458.35
  5. Step 5: Solve for x
    x = 1,735,063,458.35/54,500.15
  6. Step 6: Final answer
    x = 31,835.94

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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.