Home / 20,125.44-27,785.28-15,640.74

Finding the Fourth Proportional to 20,125.44, 27,785.28 and 15,640.74

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Solution

The fourth proportional to 20,125.44, 27,785.28 and 15,640.74 is: 21,593.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.44 : 27,785.28 = 15,640.74 : x
  2. Step 2: Convert to fraction form
    20,125.44/27,785.28 = 15,640.74/x
  3. Step 3: Cross multiply
    20,125.44x = 27,785.28 × 15,640.74
  4. Step 4: Simplify right side
    20,125.44x = 434,582,340.31
  5. Step 5: Solve for x
    x = 434,582,340.31/20,125.44
  6. Step 6: Final answer
    x = 21,593.68

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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.