Home / 7,286.78-10,931.76-2,669.78

Finding the Fourth Proportional to 7,286.78, 10,931.76 and 2,669.78

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Solution

The fourth proportional to 7,286.78, 10,931.76 and 2,669.78 is: 4,005.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,286.78 : 10,931.76 = 2,669.78 : x
  2. Step 2: Convert to fraction form
    7,286.78/10,931.76 = 2,669.78/x
  3. Step 3: Cross multiply
    7,286.78x = 10,931.76 × 2,669.78
  4. Step 4: Simplify right side
    7,286.78x = 29,185,394.21
  5. Step 5: Solve for x
    x = 29,185,394.21/7,286.78
  6. Step 6: Final answer
    x = 4,005.25

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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.