Home / 20,209.11-27,889.43-11,256.61

Finding the Fourth Proportional to 20,209.11, 27,889.43 and 11,256.61

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Solution

The fourth proportional to 20,209.11, 27,889.43 and 11,256.61 is: 15,534.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.11 : 27,889.43 = 11,256.61 : x
  2. Step 2: Convert to fraction form
    20,209.11/27,889.43 = 11,256.61/x
  3. Step 3: Cross multiply
    20,209.11x = 27,889.43 × 11,256.61
  4. Step 4: Simplify right side
    20,209.11x = 313,940,436.63
  5. Step 5: Solve for x
    x = 313,940,436.63/20,209.11
  6. Step 6: Final answer
    x = 15,534.60

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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.