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Finding the Fourth Proportional to 8,391.74, 12,587.61 and 3,769.34

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Solution

The fourth proportional to 8,391.74, 12,587.61 and 3,769.34 is: 5,654.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.74 : 12,587.61 = 3,769.34 : x
  2. Step 2: Convert to fraction form
    8,391.74/12,587.61 = 3,769.34/x
  3. Step 3: Cross multiply
    8,391.74x = 12,587.61 × 3,769.34
  4. Step 4: Simplify right side
    8,391.74x = 47,446,981.88
  5. Step 5: Solve for x
    x = 47,446,981.88/8,391.74
  6. Step 6: Final answer
    x = 5,654.01

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Similar ratio
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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.