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Finding the Fourth Proportional to 9,019.20, 12,445.20 and 5,482.80

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Solution

The fourth proportional to 9,019.20, 12,445.20 and 5,482.80 is: 7,565.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,019.20 : 12,445.20 = 5,482.80 : x
  2. Step 2: Convert to fraction form
    9,019.20/12,445.20 = 5,482.80/x
  3. Step 3: Cross multiply
    9,019.20x = 12,445.20 × 5,482.80
  4. Step 4: Simplify right side
    9,019.20x = 68,234,542.56
  5. Step 5: Solve for x
    x = 68,234,542.56/9,019.20
  6. Step 6: Final answer
    x = 7,565.48

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.