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Finding the Fourth Proportional to 8,765.56, 13,143.42 and 2,919.04

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Solution

The fourth proportional to 8,765.56, 13,143.42 and 2,919.04 is: 4,376.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.56 : 13,143.42 = 2,919.04 : x
  2. Step 2: Convert to fraction form
    8,765.56/13,143.42 = 2,919.04/x
  3. Step 3: Cross multiply
    8,765.56x = 13,143.42 × 2,919.04
  4. Step 4: Simplify right side
    8,765.56x = 38,366,168.72
  5. Step 5: Solve for x
    x = 38,366,168.72/8,765.56
  6. Step 6: Final answer
    x = 4,376.92

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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.