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Finding the Fourth Proportional to 8,758.64, 12,086.55 and 4,981.28

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Solution

The fourth proportional to 8,758.64, 12,086.55 and 4,981.28 is: 6,873.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,758.64 : 12,086.55 = 4,981.28 : x
  2. Step 2: Convert to fraction form
    8,758.64/12,086.55 = 4,981.28/x
  3. Step 3: Cross multiply
    8,758.64x = 12,086.55 × 4,981.28
  4. Step 4: Simplify right side
    8,758.64x = 60,206,429.35
  5. Step 5: Solve for x
    x = 60,206,429.35/8,758.64
  6. Step 6: Final answer
    x = 6,873.95

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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.