Home / 9,992.31-13,789.20-5,515.80

Finding the Fourth Proportional to 9,992.31, 13,789.20 and 5,515.80

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Solution

The fourth proportional to 9,992.31, 13,789.20 and 5,515.80 is: 7,611.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,992.31 : 13,789.20 = 5,515.80 : x
  2. Step 2: Convert to fraction form
    9,992.31/13,789.20 = 5,515.80/x
  3. Step 3: Cross multiply
    9,992.31x = 13,789.20 × 5,515.80
  4. Step 4: Simplify right side
    9,992.31x = 76,058,469.36
  5. Step 5: Solve for x
    x = 76,058,469.36/9,992.31
  6. Step 6: Final answer
    x = 7,611.70

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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.