Home / 20,395.38-28,119.52-13,212.91

Finding the Fourth Proportional to 20,395.38, 28,119.52 and 13,212.91

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Solution

The fourth proportional to 20,395.38, 28,119.52 and 13,212.91 is: 18,216.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.38 : 28,119.52 = 13,212.91 : x
  2. Step 2: Convert to fraction form
    20,395.38/28,119.52 = 13,212.91/x
  3. Step 3: Cross multiply
    20,395.38x = 28,119.52 × 13,212.91
  4. Step 4: Simplify right side
    20,395.38x = 371,540,687.00
  5. Step 5: Solve for x
    x = 371,540,687.00/20,395.38
  6. Step 6: Final answer
    x = 18,216.90

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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.