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Finding the Fourth Proportional to 11,195.70, 16,805.70 and 7,040.40

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Solution

The fourth proportional to 11,195.70, 16,805.70 and 7,040.40 is: 10,568.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,195.70 : 16,805.70 = 7,040.40 : x
  2. Step 2: Convert to fraction form
    11,195.70/16,805.70 = 7,040.40/x
  3. Step 3: Cross multiply
    11,195.70x = 16,805.70 × 7,040.40
  4. Step 4: Simplify right side
    11,195.70x = 118,318,850.28
  5. Step 5: Solve for x
    x = 118,318,850.28/11,195.70
  6. Step 6: Final answer
    x = 10,568.24

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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.