Home / 20,835.14-31,364.29-18,691.88

Finding the Fourth Proportional to 20,835.14, 31,364.29 and 18,691.88

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Solution

The fourth proportional to 20,835.14, 31,364.29 and 18,691.88 is: 28,137.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.14 : 31,364.29 = 18,691.88 : x
  2. Step 2: Convert to fraction form
    20,835.14/31,364.29 = 18,691.88/x
  3. Step 3: Cross multiply
    20,835.14x = 31,364.29 × 18,691.88
  4. Step 4: Simplify right side
    20,835.14x = 586,257,388.14
  5. Step 5: Solve for x
    x = 586,257,388.14/20,835.14
  6. Step 6: Final answer
    x = 28,137.92

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.