Home / 20,255.44-30,381.96-7,781.44

Finding the Fourth Proportional to 20,255.44, 30,381.96 and 7,781.44

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Solution

The fourth proportional to 20,255.44, 30,381.96 and 7,781.44 is: 11,671.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,255.44 : 30,381.96 = 7,781.44 : x
  2. Step 2: Convert to fraction form
    20,255.44/30,381.96 = 7,781.44/x
  3. Step 3: Cross multiply
    20,255.44x = 30,381.96 × 7,781.44
  4. Step 4: Simplify right side
    20,255.44x = 236,415,398.82
  5. Step 5: Solve for x
    x = 236,415,398.82/20,255.44
  6. Step 6: Final answer
    x = 11,671.70

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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.