Home / 20,803.24-28,708.72-11,371.81

Finding the Fourth Proportional to 20,803.24, 28,708.72 and 11,371.81

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Solution

The fourth proportional to 20,803.24, 28,708.72 and 11,371.81 is: 15,693.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.24 : 28,708.72 = 11,371.81 : x
  2. Step 2: Convert to fraction form
    20,803.24/28,708.72 = 11,371.81/x
  3. Step 3: Cross multiply
    20,803.24x = 28,708.72 × 11,371.81
  4. Step 4: Simplify right side
    20,803.24x = 326,469,965.64
  5. Step 5: Solve for x
    x = 326,469,965.64/20,803.24
  6. Step 6: Final answer
    x = 15,693.23

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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.