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Finding the Fourth Proportional to 8,647.28, 11,988.24 and 8,343.22

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Solution

The fourth proportional to 8,647.28, 11,988.24 and 8,343.22 is: 11,566.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,647.28 : 11,988.24 = 8,343.22 : x
  2. Step 2: Convert to fraction form
    8,647.28/11,988.24 = 8,343.22/x
  3. Step 3: Cross multiply
    8,647.28x = 11,988.24 × 8,343.22
  4. Step 4: Simplify right side
    8,647.28x = 100,020,523.73
  5. Step 5: Solve for x
    x = 100,020,523.73/8,647.28
  6. Step 6: Final answer
    x = 11,566.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.