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Finding the Fourth Proportional to 12,881.90, 19,325.99 and 3,997.01

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Solution

The fourth proportional to 12,881.90, 19,325.99 and 3,997.01 is: 5,996.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.90 : 19,325.99 = 3,997.01 : x
  2. Step 2: Convert to fraction form
    12,881.90/19,325.99 = 3,997.01/x
  3. Step 3: Cross multiply
    12,881.90x = 19,325.99 × 3,997.01
  4. Step 4: Simplify right side
    12,881.90x = 77,246,233.60
  5. Step 5: Solve for x
    x = 77,246,233.60/12,881.90
  6. Step 6: Final answer
    x = 5,996.49

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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.