Home / 39,628.60-54,687.12-21,723.55

Finding the Fourth Proportional to 39,628.60, 54,687.12 and 21,723.55

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Solution

The fourth proportional to 39,628.60, 54,687.12 and 21,723.55 is: 29,978.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,628.60 : 54,687.12 = 21,723.55 : x
  2. Step 2: Convert to fraction form
    39,628.60/54,687.12 = 21,723.55/x
  3. Step 3: Cross multiply
    39,628.60x = 54,687.12 × 21,723.55
  4. Step 4: Simplify right side
    39,628.60x = 1,187,998,385.68
  5. Step 5: Solve for x
    x = 1,187,998,385.68/39,628.60
  6. Step 6: Final answer
    x = 29,978.31

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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.