Home / 21,186.72-31,780.30-6,395.76

Finding the Fourth Proportional to 21,186.72, 31,780.30 and 6,395.76

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Solution

The fourth proportional to 21,186.72, 31,780.30 and 6,395.76 is: 9,593.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.72 : 31,780.30 = 6,395.76 : x
  2. Step 2: Convert to fraction form
    21,186.72/31,780.30 = 6,395.76/x
  3. Step 3: Cross multiply
    21,186.72x = 31,780.30 × 6,395.76
  4. Step 4: Simplify right side
    21,186.72x = 203,259,171.53
  5. Step 5: Solve for x
    x = 203,259,171.53/21,186.72
  6. Step 6: Final answer
    x = 9,593.71

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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.