Home / 13,318.92-19,981.08-3,959.10

Finding the Fourth Proportional to 13,318.92, 19,981.08 and 3,959.10

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Solution

The fourth proportional to 13,318.92, 19,981.08 and 3,959.10 is: 5,939.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.92 : 19,981.08 = 3,959.10 : x
  2. Step 2: Convert to fraction form
    13,318.92/19,981.08 = 3,959.10/x
  3. Step 3: Cross multiply
    13,318.92x = 19,981.08 × 3,959.10
  4. Step 4: Simplify right side
    13,318.92x = 79,107,093.83
  5. Step 5: Solve for x
    x = 79,107,093.83/13,318.92
  6. Step 6: Final answer
    x = 5,939.45

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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.