Home / 20,578.98-28,399.20-11,626.58

Finding the Fourth Proportional to 20,578.98, 28,399.20 and 11,626.58

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Solution

The fourth proportional to 20,578.98, 28,399.20 and 11,626.58 is: 16,044.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.98 : 28,399.20 = 11,626.58 : x
  2. Step 2: Convert to fraction form
    20,578.98/28,399.20 = 11,626.58/x
  3. Step 3: Cross multiply
    20,578.98x = 28,399.20 × 11,626.58
  4. Step 4: Simplify right side
    20,578.98x = 330,185,570.74
  5. Step 5: Solve for x
    x = 330,185,570.74/20,578.98
  6. Step 6: Final answer
    x = 16,044.80

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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.