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Finding the Fourth Proportional to 6,490.81, 8,951.43 and 4,251.87

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Solution

The fourth proportional to 6,490.81, 8,951.43 and 4,251.87 is: 5,863.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,490.81 : 8,951.43 = 4,251.87 : x
  2. Step 2: Convert to fraction form
    6,490.81/8,951.43 = 4,251.87/x
  3. Step 3: Cross multiply
    6,490.81x = 8,951.43 × 4,251.87
  4. Step 4: Simplify right side
    6,490.81x = 38,060,299.05
  5. Step 5: Solve for x
    x = 38,060,299.05/6,490.81
  6. Step 6: Final answer
    x = 5,863.72

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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.