Home / 20,942.68-28,901.05-11,382.56

Finding the Fourth Proportional to 20,942.68, 28,901.05 and 11,382.56

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Solution

The fourth proportional to 20,942.68, 28,901.05 and 11,382.56 is: 15,708.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.68 : 28,901.05 = 11,382.56 : x
  2. Step 2: Convert to fraction form
    20,942.68/28,901.05 = 11,382.56/x
  3. Step 3: Cross multiply
    20,942.68x = 28,901.05 × 11,382.56
  4. Step 4: Simplify right side
    20,942.68x = 328,968,057.06
  5. Step 5: Solve for x
    x = 328,968,057.06/20,942.68
  6. Step 6: Final answer
    x = 15,708.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.