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Finding the Fourth Proportional to 6,620.72, 9,136.53 and 3,636.63

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Solution

The fourth proportional to 6,620.72, 9,136.53 and 3,636.63 is: 5,018.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.72 : 9,136.53 = 3,636.63 : x
  2. Step 2: Convert to fraction form
    6,620.72/9,136.53 = 3,636.63/x
  3. Step 3: Cross multiply
    6,620.72x = 9,136.53 × 3,636.63
  4. Step 4: Simplify right side
    6,620.72x = 33,226,179.09
  5. Step 5: Solve for x
    x = 33,226,179.09/6,620.72
  6. Step 6: Final answer
    x = 5,018.52

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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.