Home / 39,760.80-54,870.03-21,857.64

Finding the Fourth Proportional to 39,760.80, 54,870.03 and 21,857.64

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Solution

The fourth proportional to 39,760.80, 54,870.03 and 21,857.64 is: 30,163.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,760.80 : 54,870.03 = 21,857.64 : x
  2. Step 2: Convert to fraction form
    39,760.80/54,870.03 = 21,857.64/x
  3. Step 3: Cross multiply
    39,760.80x = 54,870.03 × 21,857.64
  4. Step 4: Simplify right side
    39,760.80x = 1,199,329,362.53
  5. Step 5: Solve for x
    x = 1,199,329,362.53/39,760.80
  6. Step 6: Final answer
    x = 30,163.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.