Home / 11,981.25-17,976.20-8,688.60

Finding the Fourth Proportional to 11,981.25, 17,976.20 and 8,688.60

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Solution

The fourth proportional to 11,981.25, 17,976.20 and 8,688.60 is: 13,036.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,981.25 : 17,976.20 = 8,688.60 : x
  2. Step 2: Convert to fraction form
    11,981.25/17,976.20 = 8,688.60/x
  3. Step 3: Cross multiply
    11,981.25x = 17,976.20 × 8,688.60
  4. Step 4: Simplify right side
    11,981.25x = 156,187,967.88
  5. Step 5: Solve for x
    x = 156,187,967.88/11,981.25
  6. Step 6: Final answer
    x = 13,036.03

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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.