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Finding the Fourth Proportional to 8,762.72, 13,144.48 and 2,919.92

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Solution

The fourth proportional to 8,762.72, 13,144.48 and 2,919.92 is: 4,380.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,762.72 : 13,144.48 = 2,919.92 : x
  2. Step 2: Convert to fraction form
    8,762.72/13,144.48 = 2,919.92/x
  3. Step 3: Cross multiply
    8,762.72x = 13,144.48 × 2,919.92
  4. Step 4: Simplify right side
    8,762.72x = 38,380,830.04
  5. Step 5: Solve for x
    x = 38,380,830.04/8,762.72
  6. Step 6: Final answer
    x = 4,380.01

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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.