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Finding the Fourth Proportional to 11,985.48, 17,978.22 and 4,196.52

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Solution

The fourth proportional to 11,985.48, 17,978.22 and 4,196.52 is: 6,294.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,985.48 : 17,978.22 = 4,196.52 : x
  2. Step 2: Convert to fraction form
    11,985.48/17,978.22 = 4,196.52/x
  3. Step 3: Cross multiply
    11,985.48x = 17,978.22 × 4,196.52
  4. Step 4: Simplify right side
    11,985.48x = 75,445,959.79
  5. Step 5: Solve for x
    x = 75,445,959.79/11,985.48
  6. Step 6: Final answer
    x = 6,294.78

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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.