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Finding the Fourth Proportional to 18,000.80, 26,991.60 and 7,600.80

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Solution

The fourth proportional to 18,000.80, 26,991.60 and 7,600.80 is: 11,397.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,000.80 : 26,991.60 = 7,600.80 : x
  2. Step 2: Convert to fraction form
    18,000.80/26,991.60 = 7,600.80/x
  3. Step 3: Cross multiply
    18,000.80x = 26,991.60 × 7,600.80
  4. Step 4: Simplify right side
    18,000.80x = 205,157,753.28
  5. Step 5: Solve for x
    x = 205,157,753.28/18,000.80
  6. Step 6: Final answer
    x = 11,397.15

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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.