Home / 21,151.14-31,728.66-6,919.70

Finding the Fourth Proportional to 21,151.14, 31,728.66 and 6,919.70

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Solution

The fourth proportional to 21,151.14, 31,728.66 and 6,919.70 is: 10,380.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.14 : 31,728.66 = 6,919.70 : x
  2. Step 2: Convert to fraction form
    21,151.14/31,728.66 = 6,919.70/x
  3. Step 3: Cross multiply
    21,151.14x = 31,728.66 × 6,919.70
  4. Step 4: Simplify right side
    21,151.14x = 219,552,649.96
  5. Step 5: Solve for x
    x = 219,552,649.96/21,151.14
  6. Step 6: Final answer
    x = 10,380.18

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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.