Home / 20,871.73-31,294.84-9,781.82

Finding the Fourth Proportional to 20,871.73, 31,294.84 and 9,781.82

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Solution

The fourth proportional to 20,871.73, 31,294.84 and 9,781.82 is: 14,666.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.73 : 31,294.84 = 9,781.82 : x
  2. Step 2: Convert to fraction form
    20,871.73/31,294.84 = 9,781.82/x
  3. Step 3: Cross multiply
    20,871.73x = 31,294.84 × 9,781.82
  4. Step 4: Simplify right side
    20,871.73x = 306,120,491.81
  5. Step 5: Solve for x
    x = 306,120,491.81/20,871.73
  6. Step 6: Final answer
    x = 14,666.75

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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.