Home / 39,868.80-55,019-21,963.88

Finding the Fourth Proportional to 39,868.80, 55,019 and 21,963.88

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Solution

The fourth proportional to 39,868.80, 55,019 and 21,963.88 is: 30,310.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,868.80 : 55,019 = 21,963.88 : x
  2. Step 2: Convert to fraction form
    39,868.80/55,019 = 21,963.88/x
  3. Step 3: Cross multiply
    39,868.80x = 55,019 × 21,963.88
  4. Step 4: Simplify right side
    39,868.80x = 1,208,430,713.72
  5. Step 5: Solve for x
    x = 1,208,430,713.72/39,868.80
  6. Step 6: Final answer
    x = 30,310.19

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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.