Home / 7,015.15-9,680.88-3,871.36

Finding the Fourth Proportional to 7,015.15, 9,680.88 and 3,871.36

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Solution

The fourth proportional to 7,015.15, 9,680.88 and 3,871.36 is: 5,342.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,015.15 : 9,680.88 = 3,871.36 : x
  2. Step 2: Convert to fraction form
    7,015.15/9,680.88 = 3,871.36/x
  3. Step 3: Cross multiply
    7,015.15x = 9,680.88 × 3,871.36
  4. Step 4: Simplify right side
    7,015.15x = 37,478,171.60
  5. Step 5: Solve for x
    x = 37,478,171.60/7,015.15
  6. Step 6: Final answer
    x = 5,342.46

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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.