Home / 9,991.31-13,788.77-5,515.92

Finding the Fourth Proportional to 9,991.31, 13,788.77 and 5,515.92

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Solution

The fourth proportional to 9,991.31, 13,788.77 and 5,515.92 is: 7,612.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.31 : 13,788.77 = 5,515.92 : x
  2. Step 2: Convert to fraction form
    9,991.31/13,788.77 = 5,515.92/x
  3. Step 3: Cross multiply
    9,991.31x = 13,788.77 × 5,515.92
  4. Step 4: Simplify right side
    9,991.31x = 76,057,724.64
  5. Step 5: Solve for x
    x = 76,057,724.64/9,991.31
  6. Step 6: Final answer
    x = 7,612.39

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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.