Home / 21,214.74-31,822.11-5,419.81

Finding the Fourth Proportional to 21,214.74, 31,822.11 and 5,419.81

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Solution

The fourth proportional to 21,214.74, 31,822.11 and 5,419.81 is: 8,129.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.74 : 31,822.11 = 5,419.81 : x
  2. Step 2: Convert to fraction form
    21,214.74/31,822.11 = 5,419.81/x
  3. Step 3: Cross multiply
    21,214.74x = 31,822.11 × 5,419.81
  4. Step 4: Simplify right side
    21,214.74x = 172,469,730.77
  5. Step 5: Solve for x
    x = 172,469,730.77/21,214.74
  6. Step 6: Final answer
    x = 8,129.71

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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.