Home / 20,375.96-28,118.80-11,423.46

Finding the Fourth Proportional to 20,375.96, 28,118.80 and 11,423.46

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Solution

The fourth proportional to 20,375.96, 28,118.80 and 11,423.46 is: 15,764.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.96 : 28,118.80 = 11,423.46 : x
  2. Step 2: Convert to fraction form
    20,375.96/28,118.80 = 11,423.46/x
  3. Step 3: Cross multiply
    20,375.96x = 28,118.80 × 11,423.46
  4. Step 4: Simplify right side
    20,375.96x = 321,213,929.93
  5. Step 5: Solve for x
    x = 321,213,929.93/20,375.96
  6. Step 6: Final answer
    x = 15,764.36

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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.