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Finding the Fourth Proportional to 17,160.80, 25,717.20 and 13,656.80

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Solution

The fourth proportional to 17,160.80, 25,717.20 and 13,656.80 is: 20,466.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,160.80 : 25,717.20 = 13,656.80 : x
  2. Step 2: Convert to fraction form
    17,160.80/25,717.20 = 13,656.80/x
  3. Step 3: Cross multiply
    17,160.80x = 25,717.20 × 13,656.80
  4. Step 4: Simplify right side
    17,160.80x = 351,214,656.96
  5. Step 5: Solve for x
    x = 351,214,656.96/17,160.80
  6. Step 6: Final answer
    x = 20,466.10

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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.