Home / 20,976.24-28,949.28-15,661.86

Finding the Fourth Proportional to 20,976.24, 28,949.28 and 15,661.86

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Solution

The fourth proportional to 20,976.24, 28,949.28 and 15,661.86 is: 21,614.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.24 : 28,949.28 = 15,661.86 : x
  2. Step 2: Convert to fraction form
    20,976.24/28,949.28 = 15,661.86/x
  3. Step 3: Cross multiply
    20,976.24x = 28,949.28 × 15,661.86
  4. Step 4: Simplify right side
    20,976.24x = 453,399,570.46
  5. Step 5: Solve for x
    x = 453,399,570.46/20,976.24
  6. Step 6: Final answer
    x = 21,614.91

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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.