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Finding the Fourth Proportional to 11,198.70, 15,454.98 and 7,415.28

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Solution

The fourth proportional to 11,198.70, 15,454.98 and 7,415.28 is: 10,233.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,198.70 : 15,454.98 = 7,415.28 : x
  2. Step 2: Convert to fraction form
    11,198.70/15,454.98 = 7,415.28/x
  3. Step 3: Cross multiply
    11,198.70x = 15,454.98 × 7,415.28
  4. Step 4: Simplify right side
    11,198.70x = 114,603,004.09
  5. Step 5: Solve for x
    x = 114,603,004.09/11,198.70
  6. Step 6: Final answer
    x = 10,233.60

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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.