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Finding the Fourth Proportional to 17,979.33, 26,978.09 and 12,123.63

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Solution

The fourth proportional to 17,979.33, 26,978.09 and 12,123.63 is: 18,191.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,979.33 : 26,978.09 = 12,123.63 : x
  2. Step 2: Convert to fraction form
    17,979.33/26,978.09 = 12,123.63/x
  3. Step 3: Cross multiply
    17,979.33x = 26,978.09 × 12,123.63
  4. Step 4: Simplify right side
    17,979.33x = 327,072,381.27
  5. Step 5: Solve for x
    x = 327,072,381.27/17,979.33
  6. Step 6: Final answer
    x = 18,191.58

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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.