Home / 20,872.09-31,311.20-6,079.06

Finding the Fourth Proportional to 20,872.09, 31,311.20 and 6,079.06

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Solution

The fourth proportional to 20,872.09, 31,311.20 and 6,079.06 is: 9,119.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.09 : 31,311.20 = 6,079.06 : x
  2. Step 2: Convert to fraction form
    20,872.09/31,311.20 = 6,079.06/x
  3. Step 3: Cross multiply
    20,872.09x = 31,311.20 × 6,079.06
  4. Step 4: Simplify right side
    20,872.09x = 190,342,663.47
  5. Step 5: Solve for x
    x = 190,342,663.47/20,872.09
  6. Step 6: Final answer
    x = 9,119.48

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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.