Home / 17,661.49-26,486.39-7,128.79

Finding the Fourth Proportional to 17,661.49, 26,486.39 and 7,128.79

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Solution

The fourth proportional to 17,661.49, 26,486.39 and 7,128.79 is: 10,690.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,661.49 : 26,486.39 = 7,128.79 : x
  2. Step 2: Convert to fraction form
    17,661.49/26,486.39 = 7,128.79/x
  3. Step 3: Cross multiply
    17,661.49x = 26,486.39 × 7,128.79
  4. Step 4: Simplify right side
    17,661.49x = 188,815,876.52
  5. Step 5: Solve for x
    x = 188,815,876.52/17,661.49
  6. Step 6: Final answer
    x = 10,690.82

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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.