Home / 20,454.80-28,218.38-12,895.88

Finding the Fourth Proportional to 20,454.80, 28,218.38 and 12,895.88

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Solution

The fourth proportional to 20,454.80, 28,218.38 and 12,895.88 is: 17,790.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,454.80 : 28,218.38 = 12,895.88 : x
  2. Step 2: Convert to fraction form
    20,454.80/28,218.38 = 12,895.88/x
  3. Step 3: Cross multiply
    20,454.80x = 28,218.38 × 12,895.88
  4. Step 4: Simplify right side
    20,454.80x = 363,900,842.27
  5. Step 5: Solve for x
    x = 363,900,842.27/20,454.80
  6. Step 6: Final answer
    x = 17,790.49

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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.