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Finding the Fourth Proportional to 8,490.66, 12,740.94 and 3,559.88

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Solution

The fourth proportional to 8,490.66, 12,740.94 and 3,559.88 is: 5,341.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.66 : 12,740.94 = 3,559.88 : x
  2. Step 2: Convert to fraction form
    8,490.66/12,740.94 = 3,559.88/x
  3. Step 3: Cross multiply
    8,490.66x = 12,740.94 × 3,559.88
  4. Step 4: Simplify right side
    8,490.66x = 45,356,153.78
  5. Step 5: Solve for x
    x = 45,356,153.78/8,490.66
  6. Step 6: Final answer
    x = 5,341.89

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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.