Home / 10,915.94-15,067.21-9,439.72

Finding the Fourth Proportional to 10,915.94, 15,067.21 and 9,439.72

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Solution

The fourth proportional to 10,915.94, 15,067.21 and 9,439.72 is: 13,029.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,915.94 : 15,067.21 = 9,439.72 : x
  2. Step 2: Convert to fraction form
    10,915.94/15,067.21 = 9,439.72/x
  3. Step 3: Cross multiply
    10,915.94x = 15,067.21 × 9,439.72
  4. Step 4: Simplify right side
    10,915.94x = 142,230,243.58
  5. Step 5: Solve for x
    x = 142,230,243.58/10,915.94
  6. Step 6: Final answer
    x = 13,029.59

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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.