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Finding the Fourth Proportional to 8,751.87, 13,127.81 and 2,178.11

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Solution

The fourth proportional to 8,751.87, 13,127.81 and 2,178.11 is: 3,267.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,751.87 : 13,127.81 = 2,178.11 : x
  2. Step 2: Convert to fraction form
    8,751.87/13,127.81 = 2,178.11/x
  3. Step 3: Cross multiply
    8,751.87x = 13,127.81 × 2,178.11
  4. Step 4: Simplify right side
    8,751.87x = 28,593,836.17
  5. Step 5: Solve for x
    x = 28,593,836.17/8,751.87
  6. Step 6: Final answer
    x = 3,267.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.