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Finding the Fourth Proportional to 20,407.60, 30,604.20 and 7,260.40

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Solution

The fourth proportional to 20,407.60, 30,604.20 and 7,260.40 is: 10,888.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.60 : 30,604.20 = 7,260.40 : x
  2. Step 2: Convert to fraction form
    20,407.60/30,604.20 = 7,260.40/x
  3. Step 3: Cross multiply
    20,407.60x = 30,604.20 × 7,260.40
  4. Step 4: Simplify right side
    20,407.60x = 222,198,733.68
  5. Step 5: Solve for x
    x = 222,198,733.68/20,407.60
  6. Step 6: Final answer
    x = 10,888.04

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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.