Home / 20,474.46-28,243.71-13,680.18

Finding the Fourth Proportional to 20,474.46, 28,243.71 and 13,680.18

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Solution

The fourth proportional to 20,474.46, 28,243.71 and 13,680.18 is: 18,871.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,474.46 : 28,243.71 = 13,680.18 : x
  2. Step 2: Convert to fraction form
    20,474.46/28,243.71 = 13,680.18/x
  3. Step 3: Cross multiply
    20,474.46x = 28,243.71 × 13,680.18
  4. Step 4: Simplify right side
    20,474.46x = 386,379,036.67
  5. Step 5: Solve for x
    x = 386,379,036.67/20,474.46
  6. Step 6: Final answer
    x = 18,871.27

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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.