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Finding the Fourth Proportional to 8,009.20, 12,013.80 and 2,165.80

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Solution

The fourth proportional to 8,009.20, 12,013.80 and 2,165.80 is: 3,248.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,009.20 : 12,013.80 = 2,165.80 : x
  2. Step 2: Convert to fraction form
    8,009.20/12,013.80 = 2,165.80/x
  3. Step 3: Cross multiply
    8,009.20x = 12,013.80 × 2,165.80
  4. Step 4: Simplify right side
    8,009.20x = 26,019,488.04
  5. Step 5: Solve for x
    x = 26,019,488.04/8,009.20
  6. Step 6: Final answer
    x = 3,248.70

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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.