Home / 38,640.57-57,982.39-20,870.87

Finding the Fourth Proportional to 38,640.57, 57,982.39 and 20,870.87

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Solution

The fourth proportional to 38,640.57, 57,982.39 and 20,870.87 is: 31,317.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,640.57 : 57,982.39 = 20,870.87 : x
  2. Step 2: Convert to fraction form
    38,640.57/57,982.39 = 20,870.87/x
  3. Step 3: Cross multiply
    38,640.57x = 57,982.39 × 20,870.87
  4. Step 4: Simplify right side
    38,640.57x = 1,210,142,923.98
  5. Step 5: Solve for x
    x = 1,210,142,923.98/38,640.57
  6. Step 6: Final answer
    x = 31,317.94

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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.