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Finding the Fourth Proportional to 8,607.26, 11,889.16 and 6,642.12

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Solution

The fourth proportional to 8,607.26, 11,889.16 and 6,642.12 is: 9,174.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.26 : 11,889.16 = 6,642.12 : x
  2. Step 2: Convert to fraction form
    8,607.26/11,889.16 = 6,642.12/x
  3. Step 3: Cross multiply
    8,607.26x = 11,889.16 × 6,642.12
  4. Step 4: Simplify right side
    8,607.26x = 78,969,227.42
  5. Step 5: Solve for x
    x = 78,969,227.42/8,607.26
  6. Step 6: Final answer
    x = 9,174.72

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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.