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Finding the Fourth Proportional to 21,281.22, 29,368.29 and 11,849.99

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Solution

The fourth proportional to 21,281.22, 29,368.29 and 11,849.99 is: 16,353.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.22 : 29,368.29 = 11,849.99 : x
  2. Step 2: Convert to fraction form
    21,281.22/29,368.29 = 11,849.99/x
  3. Step 3: Cross multiply
    21,281.22x = 29,368.29 × 11,849.99
  4. Step 4: Simplify right side
    21,281.22x = 348,013,736.73
  5. Step 5: Solve for x
    x = 348,013,736.73/21,281.22
  6. Step 6: Final answer
    x = 16,353.09

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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.