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Finding the Fourth Proportional to 8,874.72, 13,312.10 and 4,979.43

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Solution

The fourth proportional to 8,874.72, 13,312.10 and 4,979.43 is: 7,469.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,874.72 : 13,312.10 = 4,979.43 : x
  2. Step 2: Convert to fraction form
    8,874.72/13,312.10 = 4,979.43/x
  3. Step 3: Cross multiply
    8,874.72x = 13,312.10 × 4,979.43
  4. Step 4: Simplify right side
    8,874.72x = 66,286,670.10
  5. Step 5: Solve for x
    x = 66,286,670.10/8,874.72
  6. Step 6: Final answer
    x = 7,469.16

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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.