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Finding the Fourth Proportional to 6,609.18, 9,115.88 and 5,612.88

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Solution

The fourth proportional to 6,609.18, 9,115.88 and 5,612.88 is: 7,741.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,609.18 : 9,115.88 = 5,612.88 : x
  2. Step 2: Convert to fraction form
    6,609.18/9,115.88 = 5,612.88/x
  3. Step 3: Cross multiply
    6,609.18x = 9,115.88 × 5,612.88
  4. Step 4: Simplify right side
    6,609.18x = 51,166,340.53
  5. Step 5: Solve for x
    x = 51,166,340.53/6,609.18
  6. Step 6: Final answer
    x = 7,741.71

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Double scale
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Similar ratio
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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.