Home / 11,612.62-15,963.68-9,991.56

Finding the Fourth Proportional to 11,612.62, 15,963.68 and 9,991.56

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Solution

The fourth proportional to 11,612.62, 15,963.68 and 9,991.56 is: 13,735.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,612.62 : 15,963.68 = 9,991.56 : x
  2. Step 2: Convert to fraction form
    11,612.62/15,963.68 = 9,991.56/x
  3. Step 3: Cross multiply
    11,612.62x = 15,963.68 × 9,991.56
  4. Step 4: Simplify right side
    11,612.62x = 159,502,031.66
  5. Step 5: Solve for x
    x = 159,502,031.66/11,612.62
  6. Step 6: Final answer
    x = 13,735.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.