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Finding the Fourth Proportional to 28,116, 38,779.92 and 17,360.64

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Solution

The fourth proportional to 28,116, 38,779.92 and 17,360.64 is: 23,945.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,116 : 38,779.92 = 17,360.64 : x
  2. Step 2: Convert to fraction form
    28,116/38,779.92 = 17,360.64/x
  3. Step 3: Cross multiply
    28,116x = 38,779.92 × 17,360.64
  4. Step 4: Simplify right side
    28,116x = 673,244,230.35
  5. Step 5: Solve for x
    x = 673,244,230.35/28,116
  6. Step 6: Final answer
    x = 23,945.24

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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.