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Finding the Fourth Proportional to 6,648.42, 9,108.39 and 6,399.30

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Solution

The fourth proportional to 6,648.42, 9,108.39 and 6,399.30 is: 8,767.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,648.42 : 9,108.39 = 6,399.30 : x
  2. Step 2: Convert to fraction form
    6,648.42/9,108.39 = 6,399.30/x
  3. Step 3: Cross multiply
    6,648.42x = 9,108.39 × 6,399.30
  4. Step 4: Simplify right side
    6,648.42x = 58,287,320.13
  5. Step 5: Solve for x
    x = 58,287,320.13/6,648.42
  6. Step 6: Final answer
    x = 8,767.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.