Home / 20,079.90-30,127.09-12,198.50

Finding the Fourth Proportional to 20,079.90, 30,127.09 and 12,198.50

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Solution

The fourth proportional to 20,079.90, 30,127.09 and 12,198.50 is: 18,302.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.90 : 30,127.09 = 12,198.50 : x
  2. Step 2: Convert to fraction form
    20,079.90/30,127.09 = 12,198.50/x
  3. Step 3: Cross multiply
    20,079.90x = 30,127.09 × 12,198.50
  4. Step 4: Simplify right side
    20,079.90x = 367,505,262.08
  5. Step 5: Solve for x
    x = 367,505,262.08/20,079.90
  6. Step 6: Final answer
    x = 18,302.15

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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.