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Finding the Fourth Proportional to 29,718, 41,020.56 and 21,358.80

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Solution

The fourth proportional to 29,718, 41,020.56 and 21,358.80 is: 29,482.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,718 : 41,020.56 = 21,358.80 : x
  2. Step 2: Convert to fraction form
    29,718/41,020.56 = 21,358.80/x
  3. Step 3: Cross multiply
    29,718x = 41,020.56 × 21,358.80
  4. Step 4: Simplify right side
    29,718x = 876,149,936.93
  5. Step 5: Solve for x
    x = 876,149,936.93/29,718
  6. Step 6: Final answer
    x = 29,482.13

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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.