Home / 20,881.71-31,324.39-5,299.34

Finding the Fourth Proportional to 20,881.71, 31,324.39 and 5,299.34

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Solution

The fourth proportional to 20,881.71, 31,324.39 and 5,299.34 is: 7,949.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.71 : 31,324.39 = 5,299.34 : x
  2. Step 2: Convert to fraction form
    20,881.71/31,324.39 = 5,299.34/x
  3. Step 3: Cross multiply
    20,881.71x = 31,324.39 × 5,299.34
  4. Step 4: Simplify right side
    20,881.71x = 165,998,423.03
  5. Step 5: Solve for x
    x = 165,998,423.03/20,881.71
  6. Step 6: Final answer
    x = 7,949.47

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1.5x scale

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.