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Finding the Fourth Proportional to 20,019.71, 30,019.39 and 6,687.92

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Solution

The fourth proportional to 20,019.71, 30,019.39 and 6,687.92 is: 10,028.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,019.71 : 30,019.39 = 6,687.92 : x
  2. Step 2: Convert to fraction form
    20,019.71/30,019.39 = 6,687.92/x
  3. Step 3: Cross multiply
    20,019.71x = 30,019.39 × 6,687.92
  4. Step 4: Simplify right side
    20,019.71x = 200,767,337.10
  5. Step 5: Solve for x
    x = 200,767,337.10/20,019.71
  6. Step 6: Final answer
    x = 10,028.48

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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.