Home / 21,186.82-31,780.46-6,395.86

Finding the Fourth Proportional to 21,186.82, 31,780.46 and 6,395.86

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Solution

The fourth proportional to 21,186.82, 31,780.46 and 6,395.86 is: 9,593.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.82 : 31,780.46 = 6,395.86 : x
  2. Step 2: Convert to fraction form
    21,186.82/31,780.46 = 6,395.86/x
  3. Step 3: Cross multiply
    21,186.82x = 31,780.46 × 6,395.86
  4. Step 4: Simplify right side
    21,186.82x = 203,263,372.90
  5. Step 5: Solve for x
    x = 203,263,372.90/21,186.82
  6. Step 6: Final answer
    x = 9,593.86

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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.