Home / 20,179.80-30,255.30-11,417.40

Finding the Fourth Proportional to 20,179.80, 30,255.30 and 11,417.40

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Solution

The fourth proportional to 20,179.80, 30,255.30 and 11,417.40 is: 17,117.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,179.80 : 30,255.30 = 11,417.40 : x
  2. Step 2: Convert to fraction form
    20,179.80/30,255.30 = 11,417.40/x
  3. Step 3: Cross multiply
    20,179.80x = 30,255.30 × 11,417.40
  4. Step 4: Simplify right side
    20,179.80x = 345,436,862.22
  5. Step 5: Solve for x
    x = 345,436,862.22/20,179.80
  6. Step 6: Final answer
    x = 17,117.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.