Home / 38,639.57-57,980.89-20,869.87

Finding the Fourth Proportional to 38,639.57, 57,980.89 and 20,869.87

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Solution

The fourth proportional to 38,639.57, 57,980.89 and 20,869.87 is: 31,316.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,639.57 : 57,980.89 = 20,869.87 : x
  2. Step 2: Convert to fraction form
    38,639.57/57,980.89 = 20,869.87/x
  3. Step 3: Cross multiply
    38,639.57x = 57,980.89 × 20,869.87
  4. Step 4: Simplify right side
    38,639.57x = 1,210,053,532.43
  5. Step 5: Solve for x
    x = 1,210,053,532.43/38,639.57
  6. Step 6: Final answer
    x = 31,316.43

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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.