Home / 21,308.86-31,979.09-17,198.11

Finding the Fourth Proportional to 21,308.86, 31,979.09 and 17,198.11

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Solution

The fourth proportional to 21,308.86, 31,979.09 and 17,198.11 is: 25,809.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.86 : 31,979.09 = 17,198.11 : x
  2. Step 2: Convert to fraction form
    21,308.86/31,979.09 = 17,198.11/x
  3. Step 3: Cross multiply
    21,308.86x = 31,979.09 × 17,198.11
  4. Step 4: Simplify right side
    21,308.86x = 549,979,907.52
  5. Step 5: Solve for x
    x = 549,979,907.52/21,308.86
  6. Step 6: Final answer
    x = 25,809.92

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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.