Home / 13,723.20-20,532.80-9,115.20

Finding the Fourth Proportional to 13,723.20, 20,532.80 and 9,115.20

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Solution

The fourth proportional to 13,723.20, 20,532.80 and 9,115.20 is: 13,638.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,723.20 : 20,532.80 = 9,115.20 : x
  2. Step 2: Convert to fraction form
    13,723.20/20,532.80 = 9,115.20/x
  3. Step 3: Cross multiply
    13,723.20x = 20,532.80 × 9,115.20
  4. Step 4: Simplify right side
    13,723.20x = 187,160,578.56
  5. Step 5: Solve for x
    x = 187,160,578.56/13,723.20
  6. Step 6: Final answer
    x = 13,638.26

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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.