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Finding the Fourth Proportional to 8,490.81, 12,736.61 and 3,560.61

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Solution

The fourth proportional to 8,490.81, 12,736.61 and 3,560.61 is: 5,341.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.81 : 12,736.61 = 3,560.61 : x
  2. Step 2: Convert to fraction form
    8,490.81/12,736.61 = 3,560.61/x
  3. Step 3: Cross multiply
    8,490.81x = 12,736.61 × 3,560.61
  4. Step 4: Simplify right side
    8,490.81x = 45,350,046.15
  5. Step 5: Solve for x
    x = 45,350,046.15/8,490.81
  6. Step 6: Final answer
    x = 5,341.08

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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.