Home / 7,112.25-9,815.09-3,968.37

Finding the Fourth Proportional to 7,112.25, 9,815.09 and 3,968.37

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Solution

The fourth proportional to 7,112.25, 9,815.09 and 3,968.37 is: 5,476.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.25 : 9,815.09 = 3,968.37 : x
  2. Step 2: Convert to fraction form
    7,112.25/9,815.09 = 3,968.37/x
  3. Step 3: Cross multiply
    7,112.25x = 9,815.09 × 3,968.37
  4. Step 4: Simplify right side
    7,112.25x = 38,949,888.86
  5. Step 5: Solve for x
    x = 38,949,888.86/7,112.25
  6. Step 6: Final answer
    x = 5,476.45

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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.