Home / 20,519.38-28,305.65-13,725.14

Finding the Fourth Proportional to 20,519.38, 28,305.65 and 13,725.14

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Solution

The fourth proportional to 20,519.38, 28,305.65 and 13,725.14 is: 18,933.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519.38 : 28,305.65 = 13,725.14 : x
  2. Step 2: Convert to fraction form
    20,519.38/28,305.65 = 13,725.14/x
  3. Step 3: Cross multiply
    20,519.38x = 28,305.65 × 13,725.14
  4. Step 4: Simplify right side
    20,519.38x = 388,499,009.04
  5. Step 5: Solve for x
    x = 388,499,009.04/20,519.38
  6. Step 6: Final answer
    x = 18,933.27

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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.