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Finding the Fourth Proportional to 7,479.86, 11,220.78 and 5,728.19

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Solution

The fourth proportional to 7,479.86, 11,220.78 and 5,728.19 is: 8,593.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,479.86 : 11,220.78 = 5,728.19 : x
  2. Step 2: Convert to fraction form
    7,479.86/11,220.78 = 5,728.19/x
  3. Step 3: Cross multiply
    7,479.86x = 11,220.78 × 5,728.19
  4. Step 4: Simplify right side
    7,479.86x = 64,274,759.79
  5. Step 5: Solve for x
    x = 64,274,759.79/7,479.86
  6. Step 6: Final answer
    x = 8,593.04

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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.