Home / 20,403.42-28,155.87-11,451.66

Finding the Fourth Proportional to 20,403.42, 28,155.87 and 11,451.66

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Solution

The fourth proportional to 20,403.42, 28,155.87 and 11,451.66 is: 15,802.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.42 : 28,155.87 = 11,451.66 : x
  2. Step 2: Convert to fraction form
    20,403.42/28,155.87 = 11,451.66/x
  3. Step 3: Cross multiply
    20,403.42x = 28,155.87 × 11,451.66
  4. Step 4: Simplify right side
    20,403.42x = 322,431,450.24
  5. Step 5: Solve for x
    x = 322,431,450.24/20,403.42
  6. Step 6: Final answer
    x = 15,802.81

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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.