Home / 11,215.26-15,479.37-7,438.64

Finding the Fourth Proportional to 11,215.26, 15,479.37 and 7,438.64

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Solution

The fourth proportional to 11,215.26, 15,479.37 and 7,438.64 is: 10,266.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,215.26 : 15,479.37 = 7,438.64 : x
  2. Step 2: Convert to fraction form
    11,215.26/15,479.37 = 7,438.64/x
  3. Step 3: Cross multiply
    11,215.26x = 15,479.37 × 7,438.64
  4. Step 4: Simplify right side
    11,215.26x = 115,145,383.46
  5. Step 5: Solve for x
    x = 115,145,383.46/11,215.26
  6. Step 6: Final answer
    x = 10,266.85

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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.