Home / 10,519.30-15,781.42-3,123.82

Finding the Fourth Proportional to 10,519.30, 15,781.42 and 3,123.82

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Solution

The fourth proportional to 10,519.30, 15,781.42 and 3,123.82 is: 4,686.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,519.30 : 15,781.42 = 3,123.82 : x
  2. Step 2: Convert to fraction form
    10,519.30/15,781.42 = 3,123.82/x
  3. Step 3: Cross multiply
    10,519.30x = 15,781.42 × 3,123.82
  4. Step 4: Simplify right side
    10,519.30x = 49,298,315.42
  5. Step 5: Solve for x
    x = 49,298,315.42/10,519.30
  6. Step 6: Final answer
    x = 4,686.46

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.