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Finding the Fourth Proportional to 21,048.93, 29,046.94 and 11,489.11

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Solution

The fourth proportional to 21,048.93, 29,046.94 and 11,489.11 is: 15,854.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,048.93 : 29,046.94 = 11,489.11 : x
  2. Step 2: Convert to fraction form
    21,048.93/29,046.94 = 11,489.11/x
  3. Step 3: Cross multiply
    21,048.93x = 29,046.94 × 11,489.11
  4. Step 4: Simplify right side
    21,048.93x = 333,723,387.48
  5. Step 5: Solve for x
    x = 333,723,387.48/21,048.93
  6. Step 6: Final answer
    x = 15,854.65

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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.