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Finding the Fourth Proportional to 39,608.40, 54,659.40 and 21,704.52

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Solution

The fourth proportional to 39,608.40, 54,659.40 and 21,704.52 is: 29,952.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,608.40 : 54,659.40 = 21,704.52 : x
  2. Step 2: Convert to fraction form
    39,608.40/54,659.40 = 21,704.52/x
  3. Step 3: Cross multiply
    39,608.40x = 54,659.40 × 21,704.52
  4. Step 4: Simplify right side
    39,608.40x = 1,186,356,040.49
  5. Step 5: Solve for x
    x = 1,186,356,040.49/39,608.40
  6. Step 6: Final answer
    x = 29,952.13

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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.