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Finding the Fourth Proportional to 7,640.36, 11,443.42 and 6,640.36

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Solution

The fourth proportional to 7,640.36, 11,443.42 and 6,640.36 is: 9,945.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,640.36 : 11,443.42 = 6,640.36 : x
  2. Step 2: Convert to fraction form
    7,640.36/11,443.42 = 6,640.36/x
  3. Step 3: Cross multiply
    7,640.36x = 11,443.42 × 6,640.36
  4. Step 4: Simplify right side
    7,640.36x = 75,988,428.43
  5. Step 5: Solve for x
    x = 75,988,428.43/7,640.36
  6. Step 6: Final answer
    x = 9,945.66

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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.