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Finding the Fourth Proportional to 21,697.88, 29,945.90 and 12,266.44

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Solution

The fourth proportional to 21,697.88, 29,945.90 and 12,266.44 is: 16,929.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,697.88 : 29,945.90 = 12,266.44 : x
  2. Step 2: Convert to fraction form
    21,697.88/29,945.90 = 12,266.44/x
  3. Step 3: Cross multiply
    21,697.88x = 29,945.90 × 12,266.44
  4. Step 4: Simplify right side
    21,697.88x = 367,329,541.40
  5. Step 5: Solve for x
    x = 367,329,541.40/21,697.88
  6. Step 6: Final answer
    x = 16,929.29

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.