Home / 21,863.04-30,174.30-15,921.72

Finding the Fourth Proportional to 21,863.04, 30,174.30 and 15,921.72

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Solution

The fourth proportional to 21,863.04, 30,174.30 and 15,921.72 is: 21,974.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,863.04 : 30,174.30 = 15,921.72 : x
  2. Step 2: Convert to fraction form
    21,863.04/30,174.30 = 15,921.72/x
  3. Step 3: Cross multiply
    21,863.04x = 30,174.30 × 15,921.72
  4. Step 4: Simplify right side
    21,863.04x = 480,426,755.80
  5. Step 5: Solve for x
    x = 480,426,755.80/21,863.04
  6. Step 6: Final answer
    x = 21,974.38

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Half scale
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Double scale
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Similar ratio
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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.