Home / 20,885.22-31,340.07-8,403.30

Finding the Fourth Proportional to 20,885.22, 31,340.07 and 8,403.30

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Solution

The fourth proportional to 20,885.22, 31,340.07 and 8,403.30 is: 12,609.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.22 : 31,340.07 = 8,403.30 : x
  2. Step 2: Convert to fraction form
    20,885.22/31,340.07 = 8,403.30/x
  3. Step 3: Cross multiply
    20,885.22x = 31,340.07 × 8,403.30
  4. Step 4: Simplify right side
    20,885.22x = 263,360,010.23
  5. Step 5: Solve for x
    x = 263,360,010.23/20,885.22
  6. Step 6: Final answer
    x = 12,609.87

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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.