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Finding the Fourth Proportional to 5,138.76, 7,711.50 and 2,061

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Solution

The fourth proportional to 5,138.76, 7,711.50 and 2,061 is: 3,092.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.76 : 7,711.50 = 2,061 : x
  2. Step 2: Convert to fraction form
    5,138.76/7,711.50 = 2,061/x
  3. Step 3: Cross multiply
    5,138.76x = 7,711.50 × 2,061
  4. Step 4: Simplify right side
    5,138.76x = 15,893,401.50
  5. Step 5: Solve for x
    x = 15,893,401.50/5,138.76
  6. Step 6: Final answer
    x = 3,092.85

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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.