Home / 20,634.57-28,475.82-12,137.05

Finding the Fourth Proportional to 20,634.57, 28,475.82 and 12,137.05

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Solution

The fourth proportional to 20,634.57, 28,475.82 and 12,137.05 is: 16,749.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,634.57 : 28,475.82 = 12,137.05 : x
  2. Step 2: Convert to fraction form
    20,634.57/28,475.82 = 12,137.05/x
  3. Step 3: Cross multiply
    20,634.57x = 28,475.82 × 12,137.05
  4. Step 4: Simplify right side
    20,634.57x = 345,612,486.73
  5. Step 5: Solve for x
    x = 345,612,486.73/20,634.57
  6. Step 6: Final answer
    x = 16,749.20

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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.