Home / 20,471.44-28,252.88-11,521.12

Finding the Fourth Proportional to 20,471.44, 28,252.88 and 11,521.12

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Solution

The fourth proportional to 20,471.44, 28,252.88 and 11,521.12 is: 15,900.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.44 : 28,252.88 = 11,521.12 : x
  2. Step 2: Convert to fraction form
    20,471.44/28,252.88 = 11,521.12/x
  3. Step 3: Cross multiply
    20,471.44x = 28,252.88 × 11,521.12
  4. Step 4: Simplify right side
    20,471.44x = 325,504,820.83
  5. Step 5: Solve for x
    x = 325,504,820.83/20,471.44
  6. Step 6: Final answer
    x = 15,900.44

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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.