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Finding the Fourth Proportional to 8,731.84, 12,999.02 and 8,679.94

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Solution

The fourth proportional to 8,731.84, 12,999.02 and 8,679.94 is: 12,921.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,731.84 : 12,999.02 = 8,679.94 : x
  2. Step 2: Convert to fraction form
    8,731.84/12,999.02 = 8,679.94/x
  3. Step 3: Cross multiply
    8,731.84x = 12,999.02 × 8,679.94
  4. Step 4: Simplify right side
    8,731.84x = 112,830,713.66
  5. Step 5: Solve for x
    x = 112,830,713.66/8,731.84
  6. Step 6: Final answer
    x = 12,921.76

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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.