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Finding the Fourth Proportional to 8,469.78, 11,685.76 and 5,480.88

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Solution

The fourth proportional to 8,469.78, 11,685.76 and 5,480.88 is: 7,561.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,469.78 : 11,685.76 = 5,480.88 : x
  2. Step 2: Convert to fraction form
    8,469.78/11,685.76 = 5,480.88/x
  3. Step 3: Cross multiply
    8,469.78x = 11,685.76 × 5,480.88
  4. Step 4: Simplify right side
    8,469.78x = 64,048,248.27
  5. Step 5: Solve for x
    x = 64,048,248.27/8,469.78
  6. Step 6: Final answer
    x = 7,561.97

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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.