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Finding the Fourth Proportional to 21,699.50, 32,552.50 and 7,851.74

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Solution

The fourth proportional to 21,699.50, 32,552.50 and 7,851.74 is: 11,778.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,699.50 : 32,552.50 = 7,851.74 : x
  2. Step 2: Convert to fraction form
    21,699.50/32,552.50 = 7,851.74/x
  3. Step 3: Cross multiply
    21,699.50x = 32,552.50 × 7,851.74
  4. Step 4: Simplify right side
    21,699.50x = 255,593,766.35
  5. Step 5: Solve for x
    x = 255,593,766.35/21,699.50
  6. Step 6: Final answer
    x = 11,778.79

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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.