Home / 20,390.30-30,508.17-12,074.78

Finding the Fourth Proportional to 20,390.30, 30,508.17 and 12,074.78

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Solution

The fourth proportional to 20,390.30, 30,508.17 and 12,074.78 is: 18,066.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,390.30 : 30,508.17 = 12,074.78 : x
  2. Step 2: Convert to fraction form
    20,390.30/30,508.17 = 12,074.78/x
  3. Step 3: Cross multiply
    20,390.30x = 30,508.17 × 12,074.78
  4. Step 4: Simplify right side
    20,390.30x = 368,379,440.95
  5. Step 5: Solve for x
    x = 368,379,440.95/20,390.30
  6. Step 6: Final answer
    x = 18,066.41

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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.