Home / 39,629.52-54,690.12-21,724.56

Finding the Fourth Proportional to 39,629.52, 54,690.12 and 21,724.56

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Solution

The fourth proportional to 39,629.52, 54,690.12 and 21,724.56 is: 29,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,629.52 : 54,690.12 = 21,724.56 : x
  2. Step 2: Convert to fraction form
    39,629.52/54,690.12 = 21,724.56/x
  3. Step 3: Cross multiply
    39,629.52x = 54,690.12 × 21,724.56
  4. Step 4: Simplify right side
    39,629.52x = 1,188,118,793.35
  5. Step 5: Solve for x
    x = 1,188,118,793.35/39,629.52
  6. Step 6: Final answer
    x = 29,980.65

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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.