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Finding the Fourth Proportional to 39,167.80, 54,051.60 and 21,262.80

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Solution

The fourth proportional to 39,167.80, 54,051.60 and 21,262.80 is: 29,342.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,167.80 : 54,051.60 = 21,262.80 : x
  2. Step 2: Convert to fraction form
    39,167.80/54,051.60 = 21,262.80/x
  3. Step 3: Cross multiply
    39,167.80x = 54,051.60 × 21,262.80
  4. Step 4: Simplify right side
    39,167.80x = 1,149,288,360.48
  5. Step 5: Solve for x
    x = 1,149,288,360.48/39,167.80
  6. Step 6: Final answer
    x = 29,342.68

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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.