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Finding the Fourth Proportional to 20,479.50, 30,724.13 and 6,628.50

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Solution

The fourth proportional to 20,479.50, 30,724.13 and 6,628.50 is: 9,944.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.50 : 30,724.13 = 6,628.50 : x
  2. Step 2: Convert to fraction form
    20,479.50/30,724.13 = 6,628.50/x
  3. Step 3: Cross multiply
    20,479.50x = 30,724.13 × 6,628.50
  4. Step 4: Simplify right side
    20,479.50x = 203,654,862.56
  5. Step 5: Solve for x
    x = 203,654,862.56/20,479.50
  6. Step 6: Final answer
    x = 9,944.33

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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.