Home / 13,680.65-20,520.97-3,292.40

Finding the Fourth Proportional to 13,680.65, 20,520.97 and 3,292.40

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Solution

The fourth proportional to 13,680.65, 20,520.97 and 3,292.40 is: 4,938.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.65 : 20,520.97 = 3,292.40 : x
  2. Step 2: Convert to fraction form
    13,680.65/20,520.97 = 3,292.40/x
  3. Step 3: Cross multiply
    13,680.65x = 20,520.97 × 3,292.40
  4. Step 4: Simplify right side
    13,680.65x = 67,563,284.70
  5. Step 5: Solve for x
    x = 67,563,284.70/13,680.65
  6. Step 6: Final answer
    x = 4,938.60

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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.