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Finding the Fourth Proportional to 6,643.68, 9,965.55 and 2,748.21

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Solution

The fourth proportional to 6,643.68, 9,965.55 and 2,748.21 is: 4,122.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,643.68 : 9,965.55 = 2,748.21 : x
  2. Step 2: Convert to fraction form
    6,643.68/9,965.55 = 2,748.21/x
  3. Step 3: Cross multiply
    6,643.68x = 9,965.55 × 2,748.21
  4. Step 4: Simplify right side
    6,643.68x = 27,387,424.17
  5. Step 5: Solve for x
    x = 27,387,424.17/6,643.68
  6. Step 6: Final answer
    x = 4,122.33

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Similar ratio
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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.