Home / 10,918.75-15,067.06-7,149.36

Finding the Fourth Proportional to 10,918.75, 15,067.06 and 7,149.36

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Solution

The fourth proportional to 10,918.75, 15,067.06 and 7,149.36 is: 9,865.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,918.75 : 15,067.06 = 7,149.36 : x
  2. Step 2: Convert to fraction form
    10,918.75/15,067.06 = 7,149.36/x
  3. Step 3: Cross multiply
    10,918.75x = 15,067.06 × 7,149.36
  4. Step 4: Simplify right side
    10,918.75x = 107,719,914.92
  5. Step 5: Solve for x
    x = 107,719,914.92/10,918.75
  6. Step 6: Final answer
    x = 9,865.59

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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.