Home / 20,787.70-31,158.40-8,304.52

Finding the Fourth Proportional to 20,787.70, 31,158.40 and 8,304.52

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Solution

The fourth proportional to 20,787.70, 31,158.40 and 8,304.52 is: 12,447.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.70 : 31,158.40 = 8,304.52 : x
  2. Step 2: Convert to fraction form
    20,787.70/31,158.40 = 8,304.52/x
  3. Step 3: Cross multiply
    20,787.70x = 31,158.40 × 8,304.52
  4. Step 4: Simplify right side
    20,787.70x = 258,755,555.97
  5. Step 5: Solve for x
    x = 258,755,555.97/20,787.70
  6. Step 6: Final answer
    x = 12,447.53

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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.