Home / 20,768.54-31,151.79-7,620.08

Finding the Fourth Proportional to 20,768.54, 31,151.79 and 7,620.08

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Solution

The fourth proportional to 20,768.54, 31,151.79 and 7,620.08 is: 11,429.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.54 : 31,151.79 = 7,620.08 : x
  2. Step 2: Convert to fraction form
    20,768.54/31,151.79 = 7,620.08/x
  3. Step 3: Cross multiply
    20,768.54x = 31,151.79 × 7,620.08
  4. Step 4: Simplify right side
    20,768.54x = 237,378,976.18
  5. Step 5: Solve for x
    x = 237,378,976.18/20,768.54
  6. Step 6: Final answer
    x = 11,429.74

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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.