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Finding the Fourth Proportional to 6,646.90, 9,172.43 and 3,662.71

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Solution

The fourth proportional to 6,646.90, 9,172.43 and 3,662.71 is: 5,054.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,646.90 : 9,172.43 = 3,662.71 : x
  2. Step 2: Convert to fraction form
    6,646.90/9,172.43 = 3,662.71/x
  3. Step 3: Cross multiply
    6,646.90x = 9,172.43 × 3,662.71
  4. Step 4: Simplify right side
    6,646.90x = 33,595,951.09
  5. Step 5: Solve for x
    x = 33,595,951.09/6,646.90
  6. Step 6: Final answer
    x = 5,054.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.