Home / 20,422.37-28,175.85-12,760.44

Finding the Fourth Proportional to 20,422.37, 28,175.85 and 12,760.44

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Solution

The fourth proportional to 20,422.37, 28,175.85 and 12,760.44 is: 17,605.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.37 : 28,175.85 = 12,760.44 : x
  2. Step 2: Convert to fraction form
    20,422.37/28,175.85 = 12,760.44/x
  3. Step 3: Cross multiply
    20,422.37x = 28,175.85 × 12,760.44
  4. Step 4: Simplify right side
    20,422.37x = 359,536,243.37
  5. Step 5: Solve for x
    x = 359,536,243.37/20,422.37
  6. Step 6: Final answer
    x = 17,605.02

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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.