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Finding the Fourth Proportional to 8,758.72, 13,142.16 and 4,376.48

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Solution

The fourth proportional to 8,758.72, 13,142.16 and 4,376.48 is: 6,566.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,758.72 : 13,142.16 = 4,376.48 : x
  2. Step 2: Convert to fraction form
    8,758.72/13,142.16 = 4,376.48/x
  3. Step 3: Cross multiply
    8,758.72x = 13,142.16 × 4,376.48
  4. Step 4: Simplify right side
    8,758.72x = 57,516,400.40
  5. Step 5: Solve for x
    x = 57,516,400.40/8,758.72
  6. Step 6: Final answer
    x = 6,566.76

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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.