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Finding the Fourth Proportional to 13,608.80, 20,393.72 and 7,753.32

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Solution

The fourth proportional to 13,608.80, 20,393.72 and 7,753.32 is: 11,618.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.80 : 20,393.72 = 7,753.32 : x
  2. Step 2: Convert to fraction form
    13,608.80/20,393.72 = 7,753.32/x
  3. Step 3: Cross multiply
    13,608.80x = 20,393.72 × 7,753.32
  4. Step 4: Simplify right side
    13,608.80x = 158,119,037.15
  5. Step 5: Solve for x
    x = 158,119,037.15/13,608.80
  6. Step 6: Final answer
    x = 11,618.88

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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.