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Finding the Fourth Proportional to 9,006.60, 13,509.90 and 8,920.20

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Solution

The fourth proportional to 9,006.60, 13,509.90 and 8,920.20 is: 13,380.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,006.60 : 13,509.90 = 8,920.20 : x
  2. Step 2: Convert to fraction form
    9,006.60/13,509.90 = 8,920.20/x
  3. Step 3: Cross multiply
    9,006.60x = 13,509.90 × 8,920.20
  4. Step 4: Simplify right side
    9,006.60x = 120,511,009.98
  5. Step 5: Solve for x
    x = 120,511,009.98/9,006.60
  6. Step 6: Final answer
    x = 13,380.30

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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.