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Finding the Fourth Proportional to 55,986, 83,987.64 and 20,930.64

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Solution

The fourth proportional to 55,986, 83,987.64 and 20,930.64 is: 31,399.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,986 : 83,987.64 = 20,930.64 : x
  2. Step 2: Convert to fraction form
    55,986/83,987.64 = 20,930.64/x
  3. Step 3: Cross multiply
    55,986x = 83,987.64 × 20,930.64
  4. Step 4: Simplify right side
    55,986x = 1,757,915,057.29
  5. Step 5: Solve for x
    x = 1,757,915,057.29/55,986
  6. Step 6: Final answer
    x = 31,399.19

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1.5x scale

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.