Home / 21,109.41-31,696.92-20,174.47

Finding the Fourth Proportional to 21,109.41, 31,696.92 and 20,174.47

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Solution

The fourth proportional to 21,109.41, 31,696.92 and 20,174.47 is: 30,293.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.41 : 31,696.92 = 20,174.47 : x
  2. Step 2: Convert to fraction form
    21,109.41/31,696.92 = 20,174.47/x
  3. Step 3: Cross multiply
    21,109.41x = 31,696.92 × 20,174.47
  4. Step 4: Simplify right side
    21,109.41x = 639,468,482.39
  5. Step 5: Solve for x
    x = 639,468,482.39/21,109.41
  6. Step 6: Final answer
    x = 30,293.05

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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.