Home / 39,865.12-55,013.61-21,959.71

Finding the Fourth Proportional to 39,865.12, 55,013.61 and 21,959.71

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Solution

The fourth proportional to 39,865.12, 55,013.61 and 21,959.71 is: 30,304.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,865.12 : 55,013.61 = 21,959.71 : x
  2. Step 2: Convert to fraction form
    39,865.12/55,013.61 = 21,959.71/x
  3. Step 3: Cross multiply
    39,865.12x = 55,013.61 × 21,959.71
  4. Step 4: Simplify right side
    39,865.12x = 1,208,082,921.65
  5. Step 5: Solve for x
    x = 1,208,082,921.65/39,865.12
  6. Step 6: Final answer
    x = 30,304.26

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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.