Home / 13,720.26-20,531.16-11,522.31

Finding the Fourth Proportional to 13,720.26, 20,531.16 and 11,522.31

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Solution

The fourth proportional to 13,720.26, 20,531.16 and 11,522.31 is: 17,242.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.26 : 20,531.16 = 11,522.31 : x
  2. Step 2: Convert to fraction form
    13,720.26/20,531.16 = 11,522.31/x
  3. Step 3: Cross multiply
    13,720.26x = 20,531.16 × 11,522.31
  4. Step 4: Simplify right side
    13,720.26x = 236,566,390.18
  5. Step 5: Solve for x
    x = 236,566,390.18/13,720.26
  6. Step 6: Final answer
    x = 17,242.12

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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.