Home / 39,718.88-54,812.12-21,815.04

Finding the Fourth Proportional to 39,718.88, 54,812.12 and 21,815.04

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Solution

The fourth proportional to 39,718.88, 54,812.12 and 21,815.04 is: 30,104.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,718.88 : 54,812.12 = 21,815.04 : x
  2. Step 2: Convert to fraction form
    39,718.88/54,812.12 = 21,815.04/x
  3. Step 3: Cross multiply
    39,718.88x = 54,812.12 × 21,815.04
  4. Step 4: Simplify right side
    39,718.88x = 1,195,728,590.28
  5. Step 5: Solve for x
    x = 1,195,728,590.28/39,718.88
  6. Step 6: Final answer
    x = 30,104.79

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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.