Home / 11,208.80-15,451.25-9,215.90

Finding the Fourth Proportional to 11,208.80, 15,451.25 and 9,215.90

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Solution

The fourth proportional to 11,208.80, 15,451.25 and 9,215.90 is: 12,704.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,208.80 : 15,451.25 = 9,215.90 : x
  2. Step 2: Convert to fraction form
    11,208.80/15,451.25 = 9,215.90/x
  3. Step 3: Cross multiply
    11,208.80x = 15,451.25 × 9,215.90
  4. Step 4: Simplify right side
    11,208.80x = 142,397,099.82
  5. Step 5: Solve for x
    x = 142,397,099.82/11,208.80
  6. Step 6: Final answer
    x = 12,704.04

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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.