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Finding the Fourth Proportional to 9,992, 13,789.18 and 5,515.74

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Solution

The fourth proportional to 9,992, 13,789.18 and 5,515.74 is: 7,611.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,992 : 13,789.18 = 5,515.74 : x
  2. Step 2: Convert to fraction form
    9,992/13,789.18 = 5,515.74/x
  3. Step 3: Cross multiply
    9,992x = 13,789.18 × 5,515.74
  4. Step 4: Simplify right side
    9,992x = 76,057,531.69
  5. Step 5: Solve for x
    x = 76,057,531.69/9,992
  6. Step 6: Final answer
    x = 7,611.84

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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.