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Finding the Fourth Proportional to 6,642.92, 9,961 and 3,720.44

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Solution

The fourth proportional to 6,642.92, 9,961 and 3,720.44 is: 5,578.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,642.92 : 9,961 = 3,720.44 : x
  2. Step 2: Convert to fraction form
    6,642.92/9,961 = 3,720.44/x
  3. Step 3: Cross multiply
    6,642.92x = 9,961 × 3,720.44
  4. Step 4: Simplify right side
    6,642.92x = 37,059,302.84
  5. Step 5: Solve for x
    x = 37,059,302.84/6,642.92
  6. Step 6: Final answer
    x = 5,578.77

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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.