Home / 20,138.75-27,794.10-12,587.52

Finding the Fourth Proportional to 20,138.75, 27,794.10 and 12,587.52

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Solution

The fourth proportional to 20,138.75, 27,794.10 and 12,587.52 is: 17,372.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.75 : 27,794.10 = 12,587.52 : x
  2. Step 2: Convert to fraction form
    20,138.75/27,794.10 = 12,587.52/x
  3. Step 3: Cross multiply
    20,138.75x = 27,794.10 × 12,587.52
  4. Step 4: Simplify right side
    20,138.75x = 349,858,789.63
  5. Step 5: Solve for x
    x = 349,858,789.63/20,138.75
  6. Step 6: Final answer
    x = 17,372.42

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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.