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Finding the Fourth Proportional to 6,876.87, 9,490.05 and 3,892.68

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Solution

The fourth proportional to 6,876.87, 9,490.05 and 3,892.68 is: 5,371.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,876.87 : 9,490.05 = 3,892.68 : x
  2. Step 2: Convert to fraction form
    6,876.87/9,490.05 = 3,892.68/x
  3. Step 3: Cross multiply
    6,876.87x = 9,490.05 × 3,892.68
  4. Step 4: Simplify right side
    6,876.87x = 36,941,727.83
  5. Step 5: Solve for x
    x = 36,941,727.83/6,876.87
  6. Step 6: Final answer
    x = 5,371.88

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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.