Home / 11,122.32-15,342.64-7,138.96

Finding the Fourth Proportional to 11,122.32, 15,342.64 and 7,138.96

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Solution

The fourth proportional to 11,122.32, 15,342.64 and 7,138.96 is: 9,847.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,122.32 : 15,342.64 = 7,138.96 : x
  2. Step 2: Convert to fraction form
    11,122.32/15,342.64 = 7,138.96/x
  3. Step 3: Cross multiply
    11,122.32x = 15,342.64 × 7,138.96
  4. Step 4: Simplify right side
    11,122.32x = 109,530,493.25
  5. Step 5: Solve for x
    x = 109,530,493.25/11,122.32
  6. Step 6: Final answer
    x = 9,847.81

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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.