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Finding the Fourth Proportional to 19,993.40, 29,943.45 and 15,805.29

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Solution

The fourth proportional to 19,993.40, 29,943.45 and 15,805.29 is: 23,671.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,993.40 : 29,943.45 = 15,805.29 : x
  2. Step 2: Convert to fraction form
    19,993.40/29,943.45 = 15,805.29/x
  3. Step 3: Cross multiply
    19,993.40x = 29,943.45 × 15,805.29
  4. Step 4: Simplify right side
    19,993.40x = 473,264,910.85
  5. Step 5: Solve for x
    x = 473,264,910.85/19,993.40
  6. Step 6: Final answer
    x = 23,671.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.