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Finding the Fourth Proportional to 8,729.18, 12,995.06 and 8,677.30

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Solution

The fourth proportional to 8,729.18, 12,995.06 and 8,677.30 is: 12,917.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,729.18 : 12,995.06 = 8,677.30 : x
  2. Step 2: Convert to fraction form
    8,729.18/12,995.06 = 8,677.30/x
  3. Step 3: Cross multiply
    8,729.18x = 12,995.06 × 8,677.30
  4. Step 4: Simplify right side
    8,729.18x = 112,761,925.78
  5. Step 5: Solve for x
    x = 112,761,925.78/8,729.18
  6. Step 6: Final answer
    x = 12,917.81

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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.