Home / 21,331.92-31,989.78-10,231.68

Finding the Fourth Proportional to 21,331.92, 31,989.78 and 10,231.68

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Solution

The fourth proportional to 21,331.92, 31,989.78 and 10,231.68 is: 15,343.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.92 : 31,989.78 = 10,231.68 : x
  2. Step 2: Convert to fraction form
    21,331.92/31,989.78 = 10,231.68/x
  3. Step 3: Cross multiply
    21,331.92x = 31,989.78 × 10,231.68
  4. Step 4: Simplify right side
    21,331.92x = 327,309,192.23
  5. Step 5: Solve for x
    x = 327,309,192.23/21,331.92
  6. Step 6: Final answer
    x = 15,343.63

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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.