Home / 28,986.48-39,991.92-16,408.80

Finding the Fourth Proportional to 28,986.48, 39,991.92 and 16,408.80

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Solution

The fourth proportional to 28,986.48, 39,991.92 and 16,408.80 is: 22,638.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,986.48 : 39,991.92 = 16,408.80 : x
  2. Step 2: Convert to fraction form
    28,986.48/39,991.92 = 16,408.80/x
  3. Step 3: Cross multiply
    28,986.48x = 39,991.92 × 16,408.80
  4. Step 4: Simplify right side
    28,986.48x = 656,219,416.90
  5. Step 5: Solve for x
    x = 656,219,416.90/28,986.48
  6. Step 6: Final answer
    x = 22,638.81

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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.