Home / 20,402.22-28,129.23-13,317.42

Finding the Fourth Proportional to 20,402.22, 28,129.23 and 13,317.42

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Solution

The fourth proportional to 20,402.22, 28,129.23 and 13,317.42 is: 18,361.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.22 : 28,129.23 = 13,317.42 : x
  2. Step 2: Convert to fraction form
    20,402.22/28,129.23 = 13,317.42/x
  3. Step 3: Cross multiply
    20,402.22x = 28,129.23 × 13,317.42
  4. Step 4: Simplify right side
    20,402.22x = 374,608,770.19
  5. Step 5: Solve for x
    x = 374,608,770.19/20,402.22
  6. Step 6: Final answer
    x = 18,361.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.