Home / 11,981.76-17,980.64-4,190.57

Finding the Fourth Proportional to 11,981.76, 17,980.64 and 4,190.57

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Solution

The fourth proportional to 11,981.76, 17,980.64 and 4,190.57 is: 6,288.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,981.76 : 17,980.64 = 4,190.57 : x
  2. Step 2: Convert to fraction form
    11,981.76/17,980.64 = 4,190.57/x
  3. Step 3: Cross multiply
    11,981.76x = 17,980.64 × 4,190.57
  4. Step 4: Simplify right side
    11,981.76x = 75,349,109.61
  5. Step 5: Solve for x
    x = 75,349,109.61/11,981.76
  6. Step 6: Final answer
    x = 6,288.65

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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.