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Finding the Fourth Proportional to 20,454.68, 30,680.39 and 7,305.68

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Solution

The fourth proportional to 20,454.68, 30,680.39 and 7,305.68 is: 10,957.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,454.68 : 30,680.39 = 7,305.68 : x
  2. Step 2: Convert to fraction form
    20,454.68/30,680.39 = 7,305.68/x
  3. Step 3: Cross multiply
    20,454.68x = 30,680.39 × 7,305.68
  4. Step 4: Simplify right side
    20,454.68x = 224,140,921.68
  5. Step 5: Solve for x
    x = 224,140,921.68/20,454.68
  6. Step 6: Final answer
    x = 10,957.93

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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.