Home / 20,375.19-28,123.74-13,302.69

Finding the Fourth Proportional to 20,375.19, 28,123.74 and 13,302.69

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Solution

The fourth proportional to 20,375.19, 28,123.74 and 13,302.69 is: 18,361.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.19 : 28,123.74 = 13,302.69 : x
  2. Step 2: Convert to fraction form
    20,375.19/28,123.74 = 13,302.69/x
  3. Step 3: Cross multiply
    20,375.19x = 28,123.74 × 13,302.69
  4. Step 4: Simplify right side
    20,375.19x = 374,121,394.86
  5. Step 5: Solve for x
    x = 374,121,394.86/20,375.19
  6. Step 6: Final answer
    x = 18,361.62

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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.