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Finding the Fourth Proportional to 17,174.64, 25,719.72 and 8,381.20

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Solution

The fourth proportional to 17,174.64, 25,719.72 and 8,381.20 is: 12,551.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,174.64 : 25,719.72 = 8,381.20 : x
  2. Step 2: Convert to fraction form
    17,174.64/25,719.72 = 8,381.20/x
  3. Step 3: Cross multiply
    17,174.64x = 25,719.72 × 8,381.20
  4. Step 4: Simplify right side
    17,174.64x = 215,562,117.26
  5. Step 5: Solve for x
    x = 215,562,117.26/17,174.64
  6. Step 6: Final answer
    x = 12,551.19

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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.