Home / 11,217.78-15,467.90-7,179.32

Finding the Fourth Proportional to 11,217.78, 15,467.90 and 7,179.32

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Solution

The fourth proportional to 11,217.78, 15,467.90 and 7,179.32 is: 9,899.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,217.78 : 15,467.90 = 7,179.32 : x
  2. Step 2: Convert to fraction form
    11,217.78/15,467.90 = 7,179.32/x
  3. Step 3: Cross multiply
    11,217.78x = 15,467.90 × 7,179.32
  4. Step 4: Simplify right side
    11,217.78x = 111,049,006.60
  5. Step 5: Solve for x
    x = 111,049,006.60/11,217.78
  6. Step 6: Final answer
    x = 9,899.37

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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.