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Finding the Fourth Proportional to 11,978.80, 17,970.39 and 4,955.02

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Solution

The fourth proportional to 11,978.80, 17,970.39 and 4,955.02 is: 7,433.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,978.80 : 17,970.39 = 4,955.02 : x
  2. Step 2: Convert to fraction form
    11,978.80/17,970.39 = 4,955.02/x
  3. Step 3: Cross multiply
    11,978.80x = 17,970.39 × 4,955.02
  4. Step 4: Simplify right side
    11,978.80x = 89,043,641.86
  5. Step 5: Solve for x
    x = 89,043,641.86/11,978.80
  6. Step 6: Final answer
    x = 7,433.44

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.