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Finding the Fourth Proportional to 8,663.57, 12,995.36 and 3,116.91

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Solution

The fourth proportional to 8,663.57, 12,995.36 and 3,116.91 is: 4,675.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,663.57 : 12,995.36 = 3,116.91 : x
  2. Step 2: Convert to fraction form
    8,663.57/12,995.36 = 3,116.91/x
  3. Step 3: Cross multiply
    8,663.57x = 12,995.36 × 3,116.91
  4. Step 4: Simplify right side
    8,663.57x = 40,505,351.95
  5. Step 5: Solve for x
    x = 40,505,351.95/8,663.57
  6. Step 6: Final answer
    x = 4,675.37

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.