Home / 39,679.62-54,759.08-21,775.78

Finding the Fourth Proportional to 39,679.62, 54,759.08 and 21,775.78

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Solution

The fourth proportional to 39,679.62, 54,759.08 and 21,775.78 is: 30,051.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,679.62 : 54,759.08 = 21,775.78 : x
  2. Step 2: Convert to fraction form
    39,679.62/54,759.08 = 21,775.78/x
  3. Step 3: Cross multiply
    39,679.62x = 54,759.08 × 21,775.78
  4. Step 4: Simplify right side
    39,679.62x = 1,192,421,679.08
  5. Step 5: Solve for x
    x = 1,192,421,679.08/39,679.62
  6. Step 6: Final answer
    x = 30,051.24

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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.