Home / 39,679.50-54,757.68-21,775.63

Finding the Fourth Proportional to 39,679.50, 54,757.68 and 21,775.63

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Solution

The fourth proportional to 39,679.50, 54,757.68 and 21,775.63 is: 30,050.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,679.50 : 54,757.68 = 21,775.63 : x
  2. Step 2: Convert to fraction form
    39,679.50/54,757.68 = 21,775.63/x
  3. Step 3: Cross multiply
    39,679.50x = 54,757.68 × 21,775.63
  4. Step 4: Simplify right side
    39,679.50x = 1,192,382,979.34
  5. Step 5: Solve for x
    x = 1,192,382,979.34/39,679.50
  6. Step 6: Final answer
    x = 30,050.35

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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.