Home / 27,721-38,255.22-15,145.76

Finding the Fourth Proportional to 27,721, 38,255.22 and 15,145.76

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Solution

The fourth proportional to 27,721, 38,255.22 and 15,145.76 is: 20,901.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,721 : 38,255.22 = 15,145.76 : x
  2. Step 2: Convert to fraction form
    27,721/38,255.22 = 15,145.76/x
  3. Step 3: Cross multiply
    27,721x = 38,255.22 × 15,145.76
  4. Step 4: Simplify right side
    27,721x = 579,404,380.87
  5. Step 5: Solve for x
    x = 579,404,380.87/27,721
  6. Step 6: Final answer
    x = 20,901.28

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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.