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Finding the Fourth Proportional to 21,272, 29,350.34 and 17,881.90

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Solution

The fourth proportional to 21,272, 29,350.34 and 17,881.90 is: 24,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272 : 29,350.34 = 17,881.90 : x
  2. Step 2: Convert to fraction form
    21,272/29,350.34 = 17,881.90/x
  3. Step 3: Cross multiply
    21,272x = 29,350.34 × 17,881.90
  4. Step 4: Simplify right side
    21,272x = 524,839,844.85
  5. Step 5: Solve for x
    x = 524,839,844.85/21,272
  6. Step 6: Final answer
    x = 24,672.80

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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.