Home / 20,916.80-31,372.92-6,125.88

Finding the Fourth Proportional to 20,916.80, 31,372.92 and 6,125.88

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Solution

The fourth proportional to 20,916.80, 31,372.92 and 6,125.88 is: 9,188.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.80 : 31,372.92 = 6,125.88 : x
  2. Step 2: Convert to fraction form
    20,916.80/31,372.92 = 6,125.88/x
  3. Step 3: Cross multiply
    20,916.80x = 31,372.92 × 6,125.88
  4. Step 4: Simplify right side
    20,916.80x = 192,186,743.17
  5. Step 5: Solve for x
    x = 192,186,743.17/20,916.80
  6. Step 6: Final answer
    x = 9,188.15

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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.