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Finding the Fourth Proportional to 8,617.59, 12,821.49 and 8,588.43

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Solution

The fourth proportional to 8,617.59, 12,821.49 and 8,588.43 is: 12,778.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,617.59 : 12,821.49 = 8,588.43 : x
  2. Step 2: Convert to fraction form
    8,617.59/12,821.49 = 8,588.43/x
  3. Step 3: Cross multiply
    8,617.59x = 12,821.49 × 8,588.43
  4. Step 4: Simplify right side
    8,617.59x = 110,116,469.36
  5. Step 5: Solve for x
    x = 110,116,469.36/8,617.59
  6. Step 6: Final answer
    x = 12,778.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.