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Finding the Fourth Proportional to 9,638.80, 14,458.20 and 8,508.85

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Solution

The fourth proportional to 9,638.80, 14,458.20 and 8,508.85 is: 12,763.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,638.80 : 14,458.20 = 8,508.85 : x
  2. Step 2: Convert to fraction form
    9,638.80/14,458.20 = 8,508.85/x
  3. Step 3: Cross multiply
    9,638.80x = 14,458.20 × 8,508.85
  4. Step 4: Simplify right side
    9,638.80x = 123,022,655.07
  5. Step 5: Solve for x
    x = 123,022,655.07/9,638.80
  6. Step 6: Final answer
    x = 12,763.28

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Half scale
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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.