Home / 13,722.29-20,543.33-12,409.06

Finding the Fourth Proportional to 13,722.29, 20,543.33 and 12,409.06

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Solution

The fourth proportional to 13,722.29, 20,543.33 and 12,409.06 is: 18,577.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.29 : 20,543.33 = 12,409.06 : x
  2. Step 2: Convert to fraction form
    13,722.29/20,543.33 = 12,409.06/x
  3. Step 3: Cross multiply
    13,722.29x = 20,543.33 × 12,409.06
  4. Step 4: Simplify right side
    13,722.29x = 254,923,414.57
  5. Step 5: Solve for x
    x = 254,923,414.57/13,722.29
  6. Step 6: Final answer
    x = 18,577.32

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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.