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Finding the Fourth Proportional to 8,971.20, 12,373.92 and 5,245.92

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Solution

The fourth proportional to 8,971.20, 12,373.92 and 5,245.92 is: 7,235.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,971.20 : 12,373.92 = 5,245.92 : x
  2. Step 2: Convert to fraction form
    8,971.20/12,373.92 = 5,245.92/x
  3. Step 3: Cross multiply
    8,971.20x = 12,373.92 × 5,245.92
  4. Step 4: Simplify right side
    8,971.20x = 64,912,594.41
  5. Step 5: Solve for x
    x = 64,912,594.41/8,971.20
  6. Step 6: Final answer
    x = 7,235.66

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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.