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Finding the Fourth Proportional to 39,642.57, 54,708.39 and 21,738.26

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Solution

The fourth proportional to 39,642.57, 54,708.39 and 21,738.26 is: 29,999.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,642.57 : 54,708.39 = 21,738.26 : x
  2. Step 2: Convert to fraction form
    39,642.57/54,708.39 = 21,738.26/x
  3. Step 3: Cross multiply
    39,642.57x = 54,708.39 × 21,738.26
  4. Step 4: Simplify right side
    39,642.57x = 1,189,264,932.46
  5. Step 5: Solve for x
    x = 1,189,264,932.46/39,642.57
  6. Step 6: Final answer
    x = 29,999.69

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.