Home / 20,121.29-30,211.56-11,253.99

Finding the Fourth Proportional to 20,121.29, 30,211.56 and 11,253.99

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Solution

The fourth proportional to 20,121.29, 30,211.56 and 11,253.99 is: 16,897.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.29 : 30,211.56 = 11,253.99 : x
  2. Step 2: Convert to fraction form
    20,121.29/30,211.56 = 11,253.99/x
  3. Step 3: Cross multiply
    20,121.29x = 30,211.56 × 11,253.99
  4. Step 4: Simplify right side
    20,121.29x = 340,000,594.12
  5. Step 5: Solve for x
    x = 340,000,594.12/20,121.29
  6. Step 6: Final answer
    x = 16,897.55

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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.