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Finding the Fourth Proportional to 39,162.80, 54,044.80 and 21,257.80

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Solution

The fourth proportional to 39,162.80, 54,044.80 and 21,257.80 is: 29,335.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,162.80 : 54,044.80 = 21,257.80 : x
  2. Step 2: Convert to fraction form
    39,162.80/54,044.80 = 21,257.80/x
  3. Step 3: Cross multiply
    39,162.80x = 54,044.80 × 21,257.80
  4. Step 4: Simplify right side
    39,162.80x = 1,148,873,549.44
  5. Step 5: Solve for x
    x = 1,148,873,549.44/39,162.80
  6. Step 6: Final answer
    x = 29,335.84

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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.