Home / 39,722.20-54,817.08-21,817.62

Finding the Fourth Proportional to 39,722.20, 54,817.08 and 21,817.62

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Solution

The fourth proportional to 39,722.20, 54,817.08 and 21,817.62 is: 30,108.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,722.20 : 54,817.08 = 21,817.62 : x
  2. Step 2: Convert to fraction form
    39,722.20/54,817.08 = 21,817.62/x
  3. Step 3: Cross multiply
    39,722.20x = 54,817.08 × 21,817.62
  4. Step 4: Simplify right side
    39,722.20x = 1,195,978,220.95
  5. Step 5: Solve for x
    x = 1,195,978,220.95/39,722.20
  6. Step 6: Final answer
    x = 30,108.56

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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.