Home / 20,728.80-28,605.71-11,297.39

Finding the Fourth Proportional to 20,728.80, 28,605.71 and 11,297.39

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Solution

The fourth proportional to 20,728.80, 28,605.71 and 11,297.39 is: 15,590.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.80 : 28,605.71 = 11,297.39 : x
  2. Step 2: Convert to fraction form
    20,728.80/28,605.71 = 11,297.39/x
  3. Step 3: Cross multiply
    20,728.80x = 28,605.71 × 11,297.39
  4. Step 4: Simplify right side
    20,728.80x = 323,169,747.31
  5. Step 5: Solve for x
    x = 323,169,747.31/20,728.80
  6. Step 6: Final answer
    x = 15,590.37

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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.