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Finding the Fourth Proportional to 7,663.78, 11,489.41 and 3,967.08

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Solution

The fourth proportional to 7,663.78, 11,489.41 and 3,967.08 is: 5,947.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,663.78 : 11,489.41 = 3,967.08 : x
  2. Step 2: Convert to fraction form
    7,663.78/11,489.41 = 3,967.08/x
  3. Step 3: Cross multiply
    7,663.78x = 11,489.41 × 3,967.08
  4. Step 4: Simplify right side
    7,663.78x = 45,579,370.50
  5. Step 5: Solve for x
    x = 45,579,370.50/7,663.78
  6. Step 6: Final answer
    x = 5,947.37

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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.