Home / 20,589.36-28,403.89-12,091.33

Finding the Fourth Proportional to 20,589.36, 28,403.89 and 12,091.33

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Solution

The fourth proportional to 20,589.36, 28,403.89 and 12,091.33 is: 16,680.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,589.36 : 28,403.89 = 12,091.33 : x
  2. Step 2: Convert to fraction form
    20,589.36/28,403.89 = 12,091.33/x
  3. Step 3: Cross multiply
    20,589.36x = 28,403.89 × 12,091.33
  4. Step 4: Simplify right side
    20,589.36x = 343,440,812.55
  5. Step 5: Solve for x
    x = 343,440,812.55/20,589.36
  6. Step 6: Final answer
    x = 16,680.50

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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.