Home / 20,604.06-28,433.61-11,172.69

Finding the Fourth Proportional to 20,604.06, 28,433.61 and 11,172.69

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Solution

The fourth proportional to 20,604.06, 28,433.61 and 11,172.69 is: 15,418.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604.06 : 28,433.61 = 11,172.69 : x
  2. Step 2: Convert to fraction form
    20,604.06/28,433.61 = 11,172.69/x
  3. Step 3: Cross multiply
    20,604.06x = 28,433.61 × 11,172.69
  4. Step 4: Simplify right side
    20,604.06x = 317,679,910.11
  5. Step 5: Solve for x
    x = 317,679,910.11/20,604.06
  6. Step 6: Final answer
    x = 15,418.32

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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.