Home / 39,721.15-54,816.15-21,816.55

Finding the Fourth Proportional to 39,721.15, 54,816.15 and 21,816.55

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Solution

The fourth proportional to 39,721.15, 54,816.15 and 21,816.55 is: 30,107.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.15 : 54,816.15 = 21,816.55 : x
  2. Step 2: Convert to fraction form
    39,721.15/54,816.15 = 21,816.55/x
  3. Step 3: Cross multiply
    39,721.15x = 54,816.15 × 21,816.55
  4. Step 4: Simplify right side
    39,721.15x = 1,195,899,277.28
  5. Step 5: Solve for x
    x = 1,195,899,277.28/39,721.15
  6. Step 6: Final answer
    x = 30,107.37

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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.