Home / 20,138.74-27,801.56-12,589.27

Finding the Fourth Proportional to 20,138.74, 27,801.56 and 12,589.27

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Solution

The fourth proportional to 20,138.74, 27,801.56 and 12,589.27 is: 17,379.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.74 : 27,801.56 = 12,589.27 : x
  2. Step 2: Convert to fraction form
    20,138.74/27,801.56 = 12,589.27/x
  3. Step 3: Cross multiply
    20,138.74x = 27,801.56 × 12,589.27
  4. Step 4: Simplify right side
    20,138.74x = 350,001,143.31
  5. Step 5: Solve for x
    x = 350,001,143.31/20,138.74
  6. Step 6: Final answer
    x = 17,379.50

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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.