Home / 10,267.78-15,387.30-7,766.86

Finding the Fourth Proportional to 10,267.78, 15,387.30 and 7,766.86

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Solution

The fourth proportional to 10,267.78, 15,387.30 and 7,766.86 is: 11,639.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,267.78 : 15,387.30 = 7,766.86 : x
  2. Step 2: Convert to fraction form
    10,267.78/15,387.30 = 7,766.86/x
  3. Step 3: Cross multiply
    10,267.78x = 15,387.30 × 7,766.86
  4. Step 4: Simplify right side
    10,267.78x = 119,511,004.88
  5. Step 5: Solve for x
    x = 119,511,004.88/10,267.78
  6. Step 6: Final answer
    x = 11,639.42

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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.