Home / 20,578.50-28,399.55-11,625.80

Finding the Fourth Proportional to 20,578.50, 28,399.55 and 11,625.80

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Solution

The fourth proportional to 20,578.50, 28,399.55 and 11,625.80 is: 16,044.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.50 : 28,399.55 = 11,625.80 : x
  2. Step 2: Convert to fraction form
    20,578.50/28,399.55 = 11,625.80/x
  3. Step 3: Cross multiply
    20,578.50x = 28,399.55 × 11,625.80
  4. Step 4: Simplify right side
    20,578.50x = 330,167,288.26
  5. Step 5: Solve for x
    x = 330,167,288.26/20,578.50
  6. Step 6: Final answer
    x = 16,044.28

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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.