Home / 10,380.10-15,568.20-2,781.47

Finding the Fourth Proportional to 10,380.10, 15,568.20 and 2,781.47

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Solution

The fourth proportional to 10,380.10, 15,568.20 and 2,781.47 is: 4,171.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,380.10 : 15,568.20 = 2,781.47 : x
  2. Step 2: Convert to fraction form
    10,380.10/15,568.20 = 2,781.47/x
  3. Step 3: Cross multiply
    10,380.10x = 15,568.20 × 2,781.47
  4. Step 4: Simplify right side
    10,380.10x = 43,302,484.21
  5. Step 5: Solve for x
    x = 43,302,484.21/10,380.10
  6. Step 6: Final answer
    x = 4,171.68

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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.