Home / 51,979.38-77,906.78-20,369.72

Finding the Fourth Proportional to 51,979.38, 77,906.78 and 20,369.72

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Solution

The fourth proportional to 51,979.38, 77,906.78 and 20,369.72 is: 30,530.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,979.38 : 77,906.78 = 20,369.72 : x
  2. Step 2: Convert to fraction form
    51,979.38/77,906.78 = 20,369.72/x
  3. Step 3: Cross multiply
    51,979.38x = 77,906.78 × 20,369.72
  4. Step 4: Simplify right side
    51,979.38x = 1,586,939,294.70
  5. Step 5: Solve for x
    x = 1,586,939,294.70/51,979.38
  6. Step 6: Final answer
    x = 30,530.17

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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.