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Finding the Fourth Proportional to 8,728.70, 12,994.31 and 8,676.79

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Solution

The fourth proportional to 8,728.70, 12,994.31 and 8,676.79 is: 12,917.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.70 : 12,994.31 = 8,676.79 : x
  2. Step 2: Convert to fraction form
    8,728.70/12,994.31 = 8,676.79/x
  3. Step 3: Cross multiply
    8,728.70x = 12,994.31 × 8,676.79
  4. Step 4: Simplify right side
    8,728.70x = 112,748,888.27
  5. Step 5: Solve for x
    x = 112,748,888.27/8,728.70
  6. Step 6: Final answer
    x = 12,917.04

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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.