Home / 20,638.71-30,966.27-6,600.90

Finding the Fourth Proportional to 20,638.71, 30,966.27 and 6,600.90

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Solution

The fourth proportional to 20,638.71, 30,966.27 and 6,600.90 is: 9,903.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.71 : 30,966.27 = 6,600.90 : x
  2. Step 2: Convert to fraction form
    20,638.71/30,966.27 = 6,600.90/x
  3. Step 3: Cross multiply
    20,638.71x = 30,966.27 × 6,600.90
  4. Step 4: Simplify right side
    20,638.71x = 204,405,251.64
  5. Step 5: Solve for x
    x = 204,405,251.64/20,638.71
  6. Step 6: Final answer
    x = 9,903.97

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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.