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Finding the Fourth Proportional to 8,461.71, 12,695.60 and 3,781.33

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Solution

The fourth proportional to 8,461.71, 12,695.60 and 3,781.33 is: 5,673.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,461.71 : 12,695.60 = 3,781.33 : x
  2. Step 2: Convert to fraction form
    8,461.71/12,695.60 = 3,781.33/x
  3. Step 3: Cross multiply
    8,461.71x = 12,695.60 × 3,781.33
  4. Step 4: Simplify right side
    8,461.71x = 48,006,230.86
  5. Step 5: Solve for x
    x = 48,006,230.86/8,461.71
  6. Step 6: Final answer
    x = 5,673.35

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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.