Home / 11,218.25-15,469.75-7,859.99

Finding the Fourth Proportional to 11,218.25, 15,469.75 and 7,859.99

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Solution

The fourth proportional to 11,218.25, 15,469.75 and 7,859.99 is: 10,838.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,218.25 : 15,469.75 = 7,859.99 : x
  2. Step 2: Convert to fraction form
    11,218.25/15,469.75 = 7,859.99/x
  3. Step 3: Cross multiply
    11,218.25x = 15,469.75 × 7,859.99
  4. Step 4: Simplify right side
    11,218.25x = 121,592,128.80
  5. Step 5: Solve for x
    x = 121,592,128.80/11,218.25
  6. Step 6: Final answer
    x = 10,838.78

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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.