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Finding the Fourth Proportional to 13,793.10, 20,689.65 and 12,480.90

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Solution

The fourth proportional to 13,793.10, 20,689.65 and 12,480.90 is: 18,721.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,793.10 : 20,689.65 = 12,480.90 : x
  2. Step 2: Convert to fraction form
    13,793.10/20,689.65 = 12,480.90/x
  3. Step 3: Cross multiply
    13,793.10x = 20,689.65 × 12,480.90
  4. Step 4: Simplify right side
    13,793.10x = 258,225,452.69
  5. Step 5: Solve for x
    x = 258,225,452.69/13,793.10
  6. Step 6: Final answer
    x = 18,721.35

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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.