Home / 7,821.86-11,732.78-2,631.38

Finding the Fourth Proportional to 7,821.86, 11,732.78 and 2,631.38

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Solution

The fourth proportional to 7,821.86, 11,732.78 and 2,631.38 is: 3,947.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.86 : 11,732.78 = 2,631.38 : x
  2. Step 2: Convert to fraction form
    7,821.86/11,732.78 = 2,631.38/x
  3. Step 3: Cross multiply
    7,821.86x = 11,732.78 × 2,631.38
  4. Step 4: Simplify right side
    7,821.86x = 30,873,330.82
  5. Step 5: Solve for x
    x = 30,873,330.82/7,821.86
  6. Step 6: Final answer
    x = 3,947.06

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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.