Home / 20,434.97-30,656.10-7,961.78

Finding the Fourth Proportional to 20,434.97, 30,656.10 and 7,961.78

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Solution

The fourth proportional to 20,434.97, 30,656.10 and 7,961.78 is: 11,944.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,434.97 : 30,656.10 = 7,961.78 : x
  2. Step 2: Convert to fraction form
    20,434.97/30,656.10 = 7,961.78/x
  3. Step 3: Cross multiply
    20,434.97x = 30,656.10 × 7,961.78
  4. Step 4: Simplify right side
    20,434.97x = 244,077,123.86
  5. Step 5: Solve for x
    x = 244,077,123.86/20,434.97
  6. Step 6: Final answer
    x = 11,944.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.