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Finding the Fourth Proportional to 11,799.72, 17,703.96 and 5,221.20

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Solution

The fourth proportional to 11,799.72, 17,703.96 and 5,221.20 is: 7,833.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,799.72 : 17,703.96 = 5,221.20 : x
  2. Step 2: Convert to fraction form
    11,799.72/17,703.96 = 5,221.20/x
  3. Step 3: Cross multiply
    11,799.72x = 17,703.96 × 5,221.20
  4. Step 4: Simplify right side
    11,799.72x = 92,435,915.95
  5. Step 5: Solve for x
    x = 92,435,915.95/11,799.72
  6. Step 6: Final answer
    x = 7,833.74

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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.