Home / 13,680.80-20,521.20-3,292.55

Finding the Fourth Proportional to 13,680.80, 20,521.20 and 3,292.55

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Solution

The fourth proportional to 13,680.80, 20,521.20 and 3,292.55 is: 4,938.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.80 : 20,521.20 = 3,292.55 : x
  2. Step 2: Convert to fraction form
    13,680.80/20,521.20 = 3,292.55/x
  3. Step 3: Cross multiply
    13,680.80x = 20,521.20 × 3,292.55
  4. Step 4: Simplify right side
    13,680.80x = 67,567,025.76
  5. Step 5: Solve for x
    x = 67,567,025.76/13,680.80
  6. Step 6: Final answer
    x = 4,938.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.