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Finding the Fourth Proportional to 11,078.85, 15,367.16 and 10,679.89

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Solution

The fourth proportional to 11,078.85, 15,367.16 and 10,679.89 is: 14,813.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,078.85 : 15,367.16 = 10,679.89 : x
  2. Step 2: Convert to fraction form
    11,078.85/15,367.16 = 10,679.89/x
  3. Step 3: Cross multiply
    11,078.85x = 15,367.16 × 10,679.89
  4. Step 4: Simplify right side
    11,078.85x = 164,119,578.41
  5. Step 5: Solve for x
    x = 164,119,578.41/11,078.85
  6. Step 6: Final answer
    x = 14,813.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.