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Finding the Fourth Proportional to 8,660.88, 11,945.88 and 8,531.28

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Solution

The fourth proportional to 8,660.88, 11,945.88 and 8,531.28 is: 11,767.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.88 : 11,945.88 = 8,531.28 : x
  2. Step 2: Convert to fraction form
    8,660.88/11,945.88 = 8,531.28/x
  3. Step 3: Cross multiply
    8,660.88x = 11,945.88 × 8,531.28
  4. Step 4: Simplify right side
    8,660.88x = 101,913,647.13
  5. Step 5: Solve for x
    x = 101,913,647.13/8,660.88
  6. Step 6: Final answer
    x = 11,767.12

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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.