Home / 20,209.50-27,889.92-11,257.38

Finding the Fourth Proportional to 20,209.50, 27,889.92 and 11,257.38

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Solution

The fourth proportional to 20,209.50, 27,889.92 and 11,257.38 is: 15,535.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.50 : 27,889.92 = 11,257.38 : x
  2. Step 2: Convert to fraction form
    20,209.50/27,889.92 = 11,257.38/x
  3. Step 3: Cross multiply
    20,209.50x = 27,889.92 × 11,257.38
  4. Step 4: Simplify right side
    20,209.50x = 313,967,427.61
  5. Step 5: Solve for x
    x = 313,967,427.61/20,209.50
  6. Step 6: Final answer
    x = 15,535.64

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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.