Home / 13,680.30-20,520.45-3,292.05

Finding the Fourth Proportional to 13,680.30, 20,520.45 and 3,292.05

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Solution

The fourth proportional to 13,680.30, 20,520.45 and 3,292.05 is: 4,938.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.30 : 20,520.45 = 3,292.05 : x
  2. Step 2: Convert to fraction form
    13,680.30/20,520.45 = 3,292.05/x
  3. Step 3: Cross multiply
    13,680.30x = 20,520.45 × 3,292.05
  4. Step 4: Simplify right side
    13,680.30x = 67,554,347.42
  5. Step 5: Solve for x
    x = 67,554,347.42/13,680.30
  6. Step 6: Final answer
    x = 4,938.08

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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.