Home / 20,918.52-31,382.10-6,127.92

Finding the Fourth Proportional to 20,918.52, 31,382.10 and 6,127.92

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Solution

The fourth proportional to 20,918.52, 31,382.10 and 6,127.92 is: 9,193.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.52 : 31,382.10 = 6,127.92 : x
  2. Step 2: Convert to fraction form
    20,918.52/31,382.10 = 6,127.92/x
  3. Step 3: Cross multiply
    20,918.52x = 31,382.10 × 6,127.92
  4. Step 4: Simplify right side
    20,918.52x = 192,306,998.23
  5. Step 5: Solve for x
    x = 192,306,998.23/20,918.52
  6. Step 6: Final answer
    x = 9,193.15

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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.