Home / 10,781.28-16,171.47-2,989.89

Finding the Fourth Proportional to 10,781.28, 16,171.47 and 2,989.89

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Solution

The fourth proportional to 10,781.28, 16,171.47 and 2,989.89 is: 4,484.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,781.28 : 16,171.47 = 2,989.89 : x
  2. Step 2: Convert to fraction form
    10,781.28/16,171.47 = 2,989.89/x
  3. Step 3: Cross multiply
    10,781.28x = 16,171.47 × 2,989.89
  4. Step 4: Simplify right side
    10,781.28x = 48,350,916.44
  5. Step 5: Solve for x
    x = 48,350,916.44/10,781.28
  6. Step 6: Final answer
    x = 4,484.71

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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.