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Finding the Fourth Proportional to 8,707, 12,015.66 and 4,981

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Solution

The fourth proportional to 8,707, 12,015.66 and 4,981 is: 6,873.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,707 : 12,015.66 = 4,981 : x
  2. Step 2: Convert to fraction form
    8,707/12,015.66 = 4,981/x
  3. Step 3: Cross multiply
    8,707x = 12,015.66 × 4,981
  4. Step 4: Simplify right side
    8,707x = 59,850,002.46
  5. Step 5: Solve for x
    x = 59,850,002.46/8,707
  6. Step 6: Final answer
    x = 6,873.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.