Home / 55,979.74-83,940.36-20,890.54

Finding the Fourth Proportional to 55,979.74, 83,940.36 and 20,890.54

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Solution

The fourth proportional to 55,979.74, 83,940.36 and 20,890.54 is: 31,324.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,979.74 : 83,940.36 = 20,890.54 : x
  2. Step 2: Convert to fraction form
    55,979.74/83,940.36 = 20,890.54/x
  3. Step 3: Cross multiply
    55,979.74x = 83,940.36 × 20,890.54
  4. Step 4: Simplify right side
    55,979.74x = 1,753,559,448.19
  5. Step 5: Solve for x
    x = 1,753,559,448.19/55,979.74
  6. Step 6: Final answer
    x = 31,324.89

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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.