Home / 20,750.30-28,634.56-12,255.15

Finding the Fourth Proportional to 20,750.30, 28,634.56 and 12,255.15

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Solution

The fourth proportional to 20,750.30, 28,634.56 and 12,255.15 is: 16,911.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.30 : 28,634.56 = 12,255.15 : x
  2. Step 2: Convert to fraction form
    20,750.30/28,634.56 = 12,255.15/x
  3. Step 3: Cross multiply
    20,750.30x = 28,634.56 × 12,255.15
  4. Step 4: Simplify right side
    20,750.30x = 350,920,899.57
  5. Step 5: Solve for x
    x = 350,920,899.57/20,750.30
  6. Step 6: Final answer
    x = 16,911.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.