Home / 20,540.45-28,350.55-12,045.31

Finding the Fourth Proportional to 20,540.45, 28,350.55 and 12,045.31

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Solution

The fourth proportional to 20,540.45, 28,350.55 and 12,045.31 is: 16,625.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.45 : 28,350.55 = 12,045.31 : x
  2. Step 2: Convert to fraction form
    20,540.45/28,350.55 = 12,045.31/x
  3. Step 3: Cross multiply
    20,540.45x = 28,350.55 × 12,045.31
  4. Step 4: Simplify right side
    20,540.45x = 341,491,163.42
  5. Step 5: Solve for x
    x = 341,491,163.42/20,540.45
  6. Step 6: Final answer
    x = 16,625.30

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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.