Home / 5,321.13-7,981.69-1,425.43

Finding the Fourth Proportional to 5,321.13, 7,981.69 and 1,425.43

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Solution

The fourth proportional to 5,321.13, 7,981.69 and 1,425.43 is: 2,138.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321.13 : 7,981.69 = 1,425.43 : x
  2. Step 2: Convert to fraction form
    5,321.13/7,981.69 = 1,425.43/x
  3. Step 3: Cross multiply
    5,321.13x = 7,981.69 × 1,425.43
  4. Step 4: Simplify right side
    5,321.13x = 11,377,340.38
  5. Step 5: Solve for x
    x = 11,377,340.38/5,321.13
  6. Step 6: Final answer
    x = 2,138.14

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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.