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Finding the Fourth Proportional to 7,991.20, 11,024.40 and 5,502.88

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Solution

The fourth proportional to 7,991.20, 11,024.40 and 5,502.88 is: 7,591.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.20 : 11,024.40 = 5,502.88 : x
  2. Step 2: Convert to fraction form
    7,991.20/11,024.40 = 5,502.88/x
  3. Step 3: Cross multiply
    7,991.20x = 11,024.40 × 5,502.88
  4. Step 4: Simplify right side
    7,991.20x = 60,665,950.27
  5. Step 5: Solve for x
    x = 60,665,950.27/7,991.20
  6. Step 6: Final answer
    x = 7,591.59

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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.