Home / 20,126.80-30,178.20-12,341.20

Finding the Fourth Proportional to 20,126.80, 30,178.20 and 12,341.20

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Solution

The fourth proportional to 20,126.80, 30,178.20 and 12,341.20 is: 18,504.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,126.80 : 30,178.20 = 12,341.20 : x
  2. Step 2: Convert to fraction form
    20,126.80/30,178.20 = 12,341.20/x
  3. Step 3: Cross multiply
    20,126.80x = 30,178.20 × 12,341.20
  4. Step 4: Simplify right side
    20,126.80x = 372,435,201.84
  5. Step 5: Solve for x
    x = 372,435,201.84/20,126.80
  6. Step 6: Final answer
    x = 18,504.44

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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.