Home / 20,222.15-30,331.80-8,534.25

Finding the Fourth Proportional to 20,222.15, 30,331.80 and 8,534.25

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Solution

The fourth proportional to 20,222.15, 30,331.80 and 8,534.25 is: 12,800.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,222.15 : 30,331.80 = 8,534.25 : x
  2. Step 2: Convert to fraction form
    20,222.15/30,331.80 = 8,534.25/x
  3. Step 3: Cross multiply
    20,222.15x = 30,331.80 × 8,534.25
  4. Step 4: Simplify right side
    20,222.15x = 258,859,164.15
  5. Step 5: Solve for x
    x = 258,859,164.15/20,222.15
  6. Step 6: Final answer
    x = 12,800.78

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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.