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Finding the Fourth Proportional to 11,915.56, 17,854.62 and 8,991.64

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Solution

The fourth proportional to 11,915.56, 17,854.62 and 8,991.64 is: 13,473.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,915.56 : 17,854.62 = 8,991.64 : x
  2. Step 2: Convert to fraction form
    11,915.56/17,854.62 = 8,991.64/x
  3. Step 3: Cross multiply
    11,915.56x = 17,854.62 × 8,991.64
  4. Step 4: Simplify right side
    11,915.56x = 160,542,315.38
  5. Step 5: Solve for x
    x = 160,542,315.38/11,915.56
  6. Step 6: Final answer
    x = 13,473.33

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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.