Home / 20,460.72-28,209.96-13,375.92

Finding the Fourth Proportional to 20,460.72, 28,209.96 and 13,375.92

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Solution

The fourth proportional to 20,460.72, 28,209.96 and 13,375.92 is: 18,441.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,460.72 : 28,209.96 = 13,375.92 : x
  2. Step 2: Convert to fraction form
    20,460.72/28,209.96 = 13,375.92/x
  3. Step 3: Cross multiply
    20,460.72x = 28,209.96 × 13,375.92
  4. Step 4: Simplify right side
    20,460.72x = 377,334,168.16
  5. Step 5: Solve for x
    x = 377,334,168.16/20,460.72
  6. Step 6: Final answer
    x = 18,441.88

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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.