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Finding the Fourth Proportional to 13,348.20, 20,020.20 and 8,402.70

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Solution

The fourth proportional to 13,348.20, 20,020.20 and 8,402.70 is: 12,602.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,348.20 : 20,020.20 = 8,402.70 : x
  2. Step 2: Convert to fraction form
    13,348.20/20,020.20 = 8,402.70/x
  3. Step 3: Cross multiply
    13,348.20x = 20,020.20 × 8,402.70
  4. Step 4: Simplify right side
    13,348.20x = 168,223,734.54
  5. Step 5: Solve for x
    x = 168,223,734.54/13,348.20
  6. Step 6: Final answer
    x = 12,602.73

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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.