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Finding the Fourth Proportional to 38,479.72, 57,716.70 and 10,779.88

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Solution

The fourth proportional to 38,479.72, 57,716.70 and 10,779.88 is: 16,169.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,479.72 : 57,716.70 = 10,779.88 : x
  2. Step 2: Convert to fraction form
    38,479.72/57,716.70 = 10,779.88/x
  3. Step 3: Cross multiply
    38,479.72x = 57,716.70 × 10,779.88
  4. Step 4: Simplify right side
    38,479.72x = 622,179,100.00
  5. Step 5: Solve for x
    x = 622,179,100.00/38,479.72
  6. Step 6: Final answer
    x = 16,169.01

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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.