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Finding the Fourth Proportional to 6,618.72, 9,138.08 and 5,909.36

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Solution

The fourth proportional to 6,618.72, 9,138.08 and 5,909.36 is: 8,158.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,618.72 : 9,138.08 = 5,909.36 : x
  2. Step 2: Convert to fraction form
    6,618.72/9,138.08 = 5,909.36/x
  3. Step 3: Cross multiply
    6,618.72x = 9,138.08 × 5,909.36
  4. Step 4: Simplify right side
    6,618.72x = 54,000,204.43
  5. Step 5: Solve for x
    x = 54,000,204.43/6,618.72
  6. Step 6: Final answer
    x = 8,158.71

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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.