Home / 11,287.35-15,578.37-7,320

Finding the Fourth Proportional to 11,287.35, 15,578.37 and 7,320

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Solution

The fourth proportional to 11,287.35, 15,578.37 and 7,320 is: 10,102.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,287.35 : 15,578.37 = 7,320 : x
  2. Step 2: Convert to fraction form
    11,287.35/15,578.37 = 7,320/x
  3. Step 3: Cross multiply
    11,287.35x = 15,578.37 × 7,320
  4. Step 4: Simplify right side
    11,287.35x = 114,033,668.40
  5. Step 5: Solve for x
    x = 114,033,668.40/11,287.35
  6. Step 6: Final answer
    x = 10,102.78

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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.