Home / 20,375.54-28,118.14-11,423.06

Finding the Fourth Proportional to 20,375.54, 28,118.14 and 11,423.06

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Solution

The fourth proportional to 20,375.54, 28,118.14 and 11,423.06 is: 15,763.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.54 : 28,118.14 = 11,423.06 : x
  2. Step 2: Convert to fraction form
    20,375.54/28,118.14 = 11,423.06/x
  3. Step 3: Cross multiply
    20,375.54x = 28,118.14 × 11,423.06
  4. Step 4: Simplify right side
    20,375.54x = 321,195,200.31
  5. Step 5: Solve for x
    x = 321,195,200.31/20,375.54
  6. Step 6: Final answer
    x = 15,763.76

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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.