Home / 19,981.28-29,961.50-5,939.39

Finding the Fourth Proportional to 19,981.28, 29,961.50 and 5,939.39

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Solution

The fourth proportional to 19,981.28, 29,961.50 and 5,939.39 is: 8,905.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,981.28 : 29,961.50 = 5,939.39 : x
  2. Step 2: Convert to fraction form
    19,981.28/29,961.50 = 5,939.39/x
  3. Step 3: Cross multiply
    19,981.28x = 29,961.50 × 5,939.39
  4. Step 4: Simplify right side
    19,981.28x = 177,953,078.69
  5. Step 5: Solve for x
    x = 177,953,078.69/19,981.28
  6. Step 6: Final answer
    x = 8,905.99

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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.