Home / 20,936.68-31,398.77-6,894.11

Finding the Fourth Proportional to 20,936.68, 31,398.77 and 6,894.11

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Solution

The fourth proportional to 20,936.68, 31,398.77 and 6,894.11 is: 10,339.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.68 : 31,398.77 = 6,894.11 : x
  2. Step 2: Convert to fraction form
    20,936.68/31,398.77 = 6,894.11/x
  3. Step 3: Cross multiply
    20,936.68x = 31,398.77 × 6,894.11
  4. Step 4: Simplify right side
    20,936.68x = 216,466,539.77
  5. Step 5: Solve for x
    x = 216,466,539.77/20,936.68
  6. Step 6: Final answer
    x = 10,339.11

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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.