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Finding the Fourth Proportional to 21,338.84, 29,443.20 and 12,262.45

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Solution

The fourth proportional to 21,338.84, 29,443.20 and 12,262.45 is: 16,919.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.84 : 29,443.20 = 12,262.45 : x
  2. Step 2: Convert to fraction form
    21,338.84/29,443.20 = 12,262.45/x
  3. Step 3: Cross multiply
    21,338.84x = 29,443.20 × 12,262.45
  4. Step 4: Simplify right side
    21,338.84x = 361,045,694.23
  5. Step 5: Solve for x
    x = 361,045,694.23/21,338.84
  6. Step 6: Final answer
    x = 16,919.65

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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.