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Finding the Fourth Proportional to 12,480.17, 18,711.93 and 5,082.63

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Solution

The fourth proportional to 12,480.17, 18,711.93 and 5,082.63 is: 7,620.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.17 : 18,711.93 = 5,082.63 : x
  2. Step 2: Convert to fraction form
    12,480.17/18,711.93 = 5,082.63/x
  3. Step 3: Cross multiply
    12,480.17x = 18,711.93 × 5,082.63
  4. Step 4: Simplify right side
    12,480.17x = 95,105,816.78
  5. Step 5: Solve for x
    x = 95,105,816.78/12,480.17
  6. Step 6: Final answer
    x = 7,620.56

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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.