Home / 20,418.24-28,179.72-12,460.80

Finding the Fourth Proportional to 20,418.24, 28,179.72 and 12,460.80

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Solution

The fourth proportional to 20,418.24, 28,179.72 and 12,460.80 is: 17,197.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.24 : 28,179.72 = 12,460.80 : x
  2. Step 2: Convert to fraction form
    20,418.24/28,179.72 = 12,460.80/x
  3. Step 3: Cross multiply
    20,418.24x = 28,179.72 × 12,460.80
  4. Step 4: Simplify right side
    20,418.24x = 351,141,854.98
  5. Step 5: Solve for x
    x = 351,141,854.98/20,418.24
  6. Step 6: Final answer
    x = 17,197.46

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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.