Home / 39,891.62-55,048.19-21,986.57

Finding the Fourth Proportional to 39,891.62, 55,048.19 and 21,986.57

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Solution

The fourth proportional to 39,891.62, 55,048.19 and 21,986.57 is: 30,340.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,891.62 : 55,048.19 = 21,986.57 : x
  2. Step 2: Convert to fraction form
    39,891.62/55,048.19 = 21,986.57/x
  3. Step 3: Cross multiply
    39,891.62x = 55,048.19 × 21,986.57
  4. Step 4: Simplify right side
    39,891.62x = 1,210,320,497.63
  5. Step 5: Solve for x
    x = 1,210,320,497.63/39,891.62
  6. Step 6: Final answer
    x = 30,340.22

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1.5x scale

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.