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Finding the Fourth Proportional to 39,978.25, 59,956.41 and 15,016.36

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Solution

The fourth proportional to 39,978.25, 59,956.41 and 15,016.36 is: 22,520.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,978.25 : 59,956.41 = 15,016.36 : x
  2. Step 2: Convert to fraction form
    39,978.25/59,956.41 = 15,016.36/x
  3. Step 3: Cross multiply
    39,978.25x = 59,956.41 × 15,016.36
  4. Step 4: Simplify right side
    39,978.25x = 900,327,036.87
  5. Step 5: Solve for x
    x = 900,327,036.87/39,978.25
  6. Step 6: Final answer
    x = 22,520.42

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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.