Home / 21,218.28-31,778.94-10,132.73

Finding the Fourth Proportional to 21,218.28, 31,778.94 and 10,132.73

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Solution

The fourth proportional to 21,218.28, 31,778.94 and 10,132.73 is: 15,175.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.28 : 31,778.94 = 10,132.73 : x
  2. Step 2: Convert to fraction form
    21,218.28/31,778.94 = 10,132.73/x
  3. Step 3: Cross multiply
    21,218.28x = 31,778.94 × 10,132.73
  4. Step 4: Simplify right side
    21,218.28x = 322,007,418.71
  5. Step 5: Solve for x
    x = 322,007,418.71/21,218.28
  6. Step 6: Final answer
    x = 15,175.94

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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.