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Finding the Fourth Proportional to 21,042.01, 29,038.10 and 11,481.79

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Solution

The fourth proportional to 21,042.01, 29,038.10 and 11,481.79 is: 15,844.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.01 : 29,038.10 = 11,481.79 : x
  2. Step 2: Convert to fraction form
    21,042.01/29,038.10 = 11,481.79/x
  3. Step 3: Cross multiply
    21,042.01x = 29,038.10 × 11,481.79
  4. Step 4: Simplify right side
    21,042.01x = 333,409,366.20
  5. Step 5: Solve for x
    x = 333,409,366.20/21,042.01
  6. Step 6: Final answer
    x = 15,844.94

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1.5x scale

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.