Home / 20,211.75-30,321.02-9,118.20

Finding the Fourth Proportional to 20,211.75, 30,321.02 and 9,118.20

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Solution

The fourth proportional to 20,211.75, 30,321.02 and 9,118.20 is: 13,678.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.75 : 30,321.02 = 9,118.20 : x
  2. Step 2: Convert to fraction form
    20,211.75/30,321.02 = 9,118.20/x
  3. Step 3: Cross multiply
    20,211.75x = 30,321.02 × 9,118.20
  4. Step 4: Simplify right side
    20,211.75x = 276,473,124.56
  5. Step 5: Solve for x
    x = 276,473,124.56/20,211.75
  6. Step 6: Final answer
    x = 13,678.83

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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.