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Finding the Fourth Proportional to 27,610.40, 38,103.95 and 20,792.21

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Solution

The fourth proportional to 27,610.40, 38,103.95 and 20,792.21 is: 28,694.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,610.40 : 38,103.95 = 20,792.21 : x
  2. Step 2: Convert to fraction form
    27,610.40/38,103.95 = 20,792.21/x
  3. Step 3: Cross multiply
    27,610.40x = 38,103.95 × 20,792.21
  4. Step 4: Simplify right side
    27,610.40x = 792,265,226.27
  5. Step 5: Solve for x
    x = 792,265,226.27/27,610.40
  6. Step 6: Final answer
    x = 28,694.45

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Half scale
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Double scale
Find fourth proportional to 27,611.40, 38,105.33 and 20,793.21
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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.