Home / 7,015.06-9,680.79-3,871.21

Finding the Fourth Proportional to 7,015.06, 9,680.79 and 3,871.21

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Solution

The fourth proportional to 7,015.06, 9,680.79 and 3,871.21 is: 5,342.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,015.06 : 9,680.79 = 3,871.21 : x
  2. Step 2: Convert to fraction form
    7,015.06/9,680.79 = 3,871.21/x
  3. Step 3: Cross multiply
    7,015.06x = 9,680.79 × 3,871.21
  4. Step 4: Simplify right side
    7,015.06x = 37,476,371.06
  5. Step 5: Solve for x
    x = 37,476,371.06/7,015.06
  6. Step 6: Final answer
    x = 5,342.27

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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.