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Finding the Fourth Proportional to 8,751.12, 13,127.46 and 2,907.78

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Solution

The fourth proportional to 8,751.12, 13,127.46 and 2,907.78 is: 4,361.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,751.12 : 13,127.46 = 2,907.78 : x
  2. Step 2: Convert to fraction form
    8,751.12/13,127.46 = 2,907.78/x
  3. Step 3: Cross multiply
    8,751.12x = 13,127.46 × 2,907.78
  4. Step 4: Simplify right side
    8,751.12x = 38,171,765.64
  5. Step 5: Solve for x
    x = 38,171,765.64/8,751.12
  6. Step 6: Final answer
    x = 4,361.93

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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.