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Finding the Fourth Proportional to 11,394.59, 15,729.33 and 6,919.78

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Solution

The fourth proportional to 11,394.59, 15,729.33 and 6,919.78 is: 9,552.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,394.59 : 15,729.33 = 6,919.78 : x
  2. Step 2: Convert to fraction form
    11,394.59/15,729.33 = 6,919.78/x
  3. Step 3: Cross multiply
    11,394.59x = 15,729.33 × 6,919.78
  4. Step 4: Simplify right side
    11,394.59x = 108,843,503.15
  5. Step 5: Solve for x
    x = 108,843,503.15/11,394.59
  6. Step 6: Final answer
    x = 9,552.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.