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Finding the Fourth Proportional to 8,728.93, 12,994.68 and 8,677.05

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Solution

The fourth proportional to 8,728.93, 12,994.68 and 8,677.05 is: 12,917.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.93 : 12,994.68 = 8,677.05 : x
  2. Step 2: Convert to fraction form
    8,728.93/12,994.68 = 8,677.05/x
  3. Step 3: Cross multiply
    8,728.93x = 12,994.68 × 8,677.05
  4. Step 4: Simplify right side
    8,728.93x = 112,755,488.09
  5. Step 5: Solve for x
    x = 112,755,488.09/8,728.93
  6. Step 6: Final answer
    x = 12,917.45

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Double scale
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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.