Home / 39,880.17-55,033.92-21,976.83

Finding the Fourth Proportional to 39,880.17, 55,033.92 and 21,976.83

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Solution

The fourth proportional to 39,880.17, 55,033.92 and 21,976.83 is: 30,327.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,880.17 : 55,033.92 = 21,976.83 : x
  2. Step 2: Convert to fraction form
    39,880.17/55,033.92 = 21,976.83/x
  3. Step 3: Cross multiply
    39,880.17x = 55,033.92 × 21,976.83
  4. Step 4: Simplify right side
    39,880.17x = 1,209,471,104.07
  5. Step 5: Solve for x
    x = 1,209,471,104.07/39,880.17
  6. Step 6: Final answer
    x = 30,327.63

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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.