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Finding the Fourth Proportional to 17,980.35, 26,979.64 and 11,980.53

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Solution

The fourth proportional to 17,980.35, 26,979.64 and 11,980.53 is: 17,976.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,980.35 : 26,979.64 = 11,980.53 : x
  2. Step 2: Convert to fraction form
    17,980.35/26,979.64 = 11,980.53/x
  3. Step 3: Cross multiply
    17,980.35x = 26,979.64 × 11,980.53
  4. Step 4: Simplify right side
    17,980.35x = 323,230,371.43
  5. Step 5: Solve for x
    x = 323,230,371.43/17,980.35
  6. Step 6: Final answer
    x = 17,976.87

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1.5x scale

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.