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Finding the Fourth Proportional to 15,756.54, 21,743.98 and 8,682.96

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Solution

The fourth proportional to 15,756.54, 21,743.98 and 8,682.96 is: 11,982.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,756.54 : 21,743.98 = 8,682.96 : x
  2. Step 2: Convert to fraction form
    15,756.54/21,743.98 = 8,682.96/x
  3. Step 3: Cross multiply
    15,756.54x = 21,743.98 × 8,682.96
  4. Step 4: Simplify right side
    15,756.54x = 188,802,108.58
  5. Step 5: Solve for x
    x = 188,802,108.58/15,756.54
  6. Step 6: Final answer
    x = 11,982.46

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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.