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Finding the Fourth Proportional to 36,291.88, 54,391.74 and 19,887.40

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Solution

The fourth proportional to 36,291.88, 54,391.74 and 19,887.40 is: 29,805.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,291.88 : 54,391.74 = 19,887.40 : x
  2. Step 2: Convert to fraction form
    36,291.88/54,391.74 = 19,887.40/x
  3. Step 3: Cross multiply
    36,291.88x = 54,391.74 × 19,887.40
  4. Step 4: Simplify right side
    36,291.88x = 1,081,710,290.08
  5. Step 5: Solve for x
    x = 1,081,710,290.08/36,291.88
  6. Step 6: Final answer
    x = 29,805.85

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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.