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Finding the Fourth Proportional to 17,980.27, 26,979.52 and 11,980.45

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Solution

The fourth proportional to 17,980.27, 26,979.52 and 11,980.45 is: 17,976.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,980.27 : 26,979.52 = 11,980.45 : x
  2. Step 2: Convert to fraction form
    17,980.27/26,979.52 = 11,980.45/x
  3. Step 3: Cross multiply
    17,980.27x = 26,979.52 × 11,980.45
  4. Step 4: Simplify right side
    17,980.27x = 323,226,670.52
  5. Step 5: Solve for x
    x = 323,226,670.52/17,980.27
  6. Step 6: Final answer
    x = 17,976.74

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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.