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Finding the Fourth Proportional to 8,671.76, 13,010.08 and 3,993.20

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Solution

The fourth proportional to 8,671.76, 13,010.08 and 3,993.20 is: 5,990.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671.76 : 13,010.08 = 3,993.20 : x
  2. Step 2: Convert to fraction form
    8,671.76/13,010.08 = 3,993.20/x
  3. Step 3: Cross multiply
    8,671.76x = 13,010.08 × 3,993.20
  4. Step 4: Simplify right side
    8,671.76x = 51,951,851.46
  5. Step 5: Solve for x
    x = 51,951,851.46/8,671.76
  6. Step 6: Final answer
    x = 5,990.92

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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.