Home / 20,387.38-28,141.56-12,325.54

Finding the Fourth Proportional to 20,387.38, 28,141.56 and 12,325.54

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Solution

The fourth proportional to 20,387.38, 28,141.56 and 12,325.54 is: 17,013.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.38 : 28,141.56 = 12,325.54 : x
  2. Step 2: Convert to fraction form
    20,387.38/28,141.56 = 12,325.54/x
  3. Step 3: Cross multiply
    20,387.38x = 28,141.56 × 12,325.54
  4. Step 4: Simplify right side
    20,387.38x = 346,859,923.44
  5. Step 5: Solve for x
    x = 346,859,923.44/20,387.38
  6. Step 6: Final answer
    x = 17,013.46

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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.