Home / 20,939.57-28,896.61-11,508.74

Finding the Fourth Proportional to 20,939.57, 28,896.61 and 11,508.74

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Solution

The fourth proportional to 20,939.57, 28,896.61 and 11,508.74 is: 15,882.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.57 : 28,896.61 = 11,508.74 : x
  2. Step 2: Convert to fraction form
    20,939.57/28,896.61 = 11,508.74/x
  3. Step 3: Cross multiply
    20,939.57x = 28,896.61 × 11,508.74
  4. Step 4: Simplify right side
    20,939.57x = 332,563,426.89
  5. Step 5: Solve for x
    x = 332,563,426.89/20,939.57
  6. Step 6: Final answer
    x = 15,882.06

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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.