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Finding the Fourth Proportional to 15,088.31, 20,821.92 and 8,373.96

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Solution

The fourth proportional to 15,088.31, 20,821.92 and 8,373.96 is: 11,556.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,088.31 : 20,821.92 = 8,373.96 : x
  2. Step 2: Convert to fraction form
    15,088.31/20,821.92 = 8,373.96/x
  3. Step 3: Cross multiply
    15,088.31x = 20,821.92 × 8,373.96
  4. Step 4: Simplify right side
    15,088.31x = 174,361,779.22
  5. Step 5: Solve for x
    x = 174,361,779.22/15,088.31
  6. Step 6: Final answer
    x = 11,556.08

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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.