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Finding the Fourth Proportional to 5,687.78, 7,849.14 and 3,170.12

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Solution

The fourth proportional to 5,687.78, 7,849.14 and 3,170.12 is: 4,374.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,687.78 : 7,849.14 = 3,170.12 : x
  2. Step 2: Convert to fraction form
    5,687.78/7,849.14 = 3,170.12/x
  3. Step 3: Cross multiply
    5,687.78x = 7,849.14 × 3,170.12
  4. Step 4: Simplify right side
    5,687.78x = 24,882,715.70
  5. Step 5: Solve for x
    x = 24,882,715.70/5,687.78
  6. Step 6: Final answer
    x = 4,374.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.