Home / 20,891.82-31,339.93-6,100.78

Finding the Fourth Proportional to 20,891.82, 31,339.93 and 6,100.78

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Solution

The fourth proportional to 20,891.82, 31,339.93 and 6,100.78 is: 9,151.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.82 : 31,339.93 = 6,100.78 : x
  2. Step 2: Convert to fraction form
    20,891.82/31,339.93 = 6,100.78/x
  3. Step 3: Cross multiply
    20,891.82x = 31,339.93 × 6,100.78
  4. Step 4: Simplify right side
    20,891.82x = 191,198,030.11
  5. Step 5: Solve for x
    x = 191,198,030.11/20,891.82
  6. Step 6: Final answer
    x = 9,151.81

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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.