Home / 10,991.36-15,168.82-6,209.64

Finding the Fourth Proportional to 10,991.36, 15,168.82 and 6,209.64

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Solution

The fourth proportional to 10,991.36, 15,168.82 and 6,209.64 is: 8,569.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.36 : 15,168.82 = 6,209.64 : x
  2. Step 2: Convert to fraction form
    10,991.36/15,168.82 = 6,209.64/x
  3. Step 3: Cross multiply
    10,991.36x = 15,168.82 × 6,209.64
  4. Step 4: Simplify right side
    10,991.36x = 94,192,933.82
  5. Step 5: Solve for x
    x = 94,192,933.82/10,991.36
  6. Step 6: Final answer
    x = 8,569.73

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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.