Home / 20,474.84-28,244.23-13,680.56

Finding the Fourth Proportional to 20,474.84, 28,244.23 and 13,680.56

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Solution

The fourth proportional to 20,474.84, 28,244.23 and 13,680.56 is: 18,871.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,474.84 : 28,244.23 = 13,680.56 : x
  2. Step 2: Convert to fraction form
    20,474.84/28,244.23 = 13,680.56/x
  3. Step 3: Cross multiply
    20,474.84x = 28,244.23 × 13,680.56
  4. Step 4: Simplify right side
    20,474.84x = 386,396,707.75
  5. Step 5: Solve for x
    x = 386,396,707.75/20,474.84
  6. Step 6: Final answer
    x = 18,871.79

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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.