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Finding the Fourth Proportional to 11,985.37, 17,978.02 and 3,220.27

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Solution

The fourth proportional to 11,985.37, 17,978.02 and 3,220.27 is: 4,830.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,985.37 : 17,978.02 = 3,220.27 : x
  2. Step 2: Convert to fraction form
    11,985.37/17,978.02 = 3,220.27/x
  3. Step 3: Cross multiply
    11,985.37x = 17,978.02 × 3,220.27
  4. Step 4: Simplify right side
    11,985.37x = 57,894,025.47
  5. Step 5: Solve for x
    x = 57,894,025.47/11,985.37
  6. Step 6: Final answer
    x = 4,830.39

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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.