Home / 11,215.30-16,815.66-5,375.20

Finding the Fourth Proportional to 11,215.30, 16,815.66 and 5,375.20

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Solution

The fourth proportional to 11,215.30, 16,815.66 and 5,375.20 is: 8,059.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,215.30 : 16,815.66 = 5,375.20 : x
  2. Step 2: Convert to fraction form
    11,215.30/16,815.66 = 5,375.20/x
  3. Step 3: Cross multiply
    11,215.30x = 16,815.66 × 5,375.20
  4. Step 4: Simplify right side
    11,215.30x = 90,387,535.63
  5. Step 5: Solve for x
    x = 90,387,535.63/11,215.30
  6. Step 6: Final answer
    x = 8,059.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.