Home / 20,900.70-31,352.06-8,419.04

Finding the Fourth Proportional to 20,900.70, 31,352.06 and 8,419.04

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Solution

The fourth proportional to 20,900.70, 31,352.06 and 8,419.04 is: 12,628.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.70 : 31,352.06 = 8,419.04 : x
  2. Step 2: Convert to fraction form
    20,900.70/31,352.06 = 8,419.04/x
  3. Step 3: Cross multiply
    20,900.70x = 31,352.06 × 8,419.04
  4. Step 4: Simplify right side
    20,900.70x = 263,954,229.08
  5. Step 5: Solve for x
    x = 263,954,229.08/20,900.70
  6. Step 6: Final answer
    x = 12,628.97

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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.