Home / 21,105.27-29,258.48-19,981.70

Finding the Fourth Proportional to 21,105.27, 29,258.48 and 19,981.70

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Solution

The fourth proportional to 21,105.27, 29,258.48 and 19,981.70 is: 27,700.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.27 : 29,258.48 = 19,981.70 : x
  2. Step 2: Convert to fraction form
    21,105.27/29,258.48 = 19,981.70/x
  3. Step 3: Cross multiply
    21,105.27x = 29,258.48 × 19,981.70
  4. Step 4: Simplify right side
    21,105.27x = 584,633,923.62
  5. Step 5: Solve for x
    x = 584,633,923.62/21,105.27
  6. Step 6: Final answer
    x = 27,700.85

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.