Home / 20,728.88-28,605.86-11,297.45

Finding the Fourth Proportional to 20,728.88, 28,605.86 and 11,297.45

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Solution

The fourth proportional to 20,728.88, 28,605.86 and 11,297.45 is: 15,590.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.88 : 28,605.86 = 11,297.45 : x
  2. Step 2: Convert to fraction form
    20,728.88/28,605.86 = 11,297.45/x
  3. Step 3: Cross multiply
    20,728.88x = 28,605.86 × 11,297.45
  4. Step 4: Simplify right side
    20,728.88x = 323,173,073.54
  5. Step 5: Solve for x
    x = 323,173,073.54/20,728.88
  6. Step 6: Final answer
    x = 15,590.48

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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.