Home / 20,229.36-30,353.67-9,139.44

Finding the Fourth Proportional to 20,229.36, 30,353.67 and 9,139.44

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Solution

The fourth proportional to 20,229.36, 30,353.67 and 9,139.44 is: 13,713.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,229.36 : 30,353.67 = 9,139.44 : x
  2. Step 2: Convert to fraction form
    20,229.36/30,353.67 = 9,139.44/x
  3. Step 3: Cross multiply
    20,229.36x = 30,353.67 × 9,139.44
  4. Step 4: Simplify right side
    20,229.36x = 277,415,545.74
  5. Step 5: Solve for x
    x = 277,415,545.74/20,229.36
  6. Step 6: Final answer
    x = 13,713.51

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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.