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Finding the Fourth Proportional to 12,665.03, 18,997.10 and 3,899.72

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Solution

The fourth proportional to 12,665.03, 18,997.10 and 3,899.72 is: 5,849.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,665.03 : 18,997.10 = 3,899.72 : x
  2. Step 2: Convert to fraction form
    12,665.03/18,997.10 = 3,899.72/x
  3. Step 3: Cross multiply
    12,665.03x = 18,997.10 × 3,899.72
  4. Step 4: Simplify right side
    12,665.03x = 74,083,398.81
  5. Step 5: Solve for x
    x = 74,083,398.81/12,665.03
  6. Step 6: Final answer
    x = 5,849.44

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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.