Home / 20,604.36-28,434-11,172.88

Finding the Fourth Proportional to 20,604.36, 28,434 and 11,172.88

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Solution

The fourth proportional to 20,604.36, 28,434 and 11,172.88 is: 15,418.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604.36 : 28,434 = 11,172.88 : x
  2. Step 2: Convert to fraction form
    20,604.36/28,434 = 11,172.88/x
  3. Step 3: Cross multiply
    20,604.36x = 28,434 × 11,172.88
  4. Step 4: Simplify right side
    20,604.36x = 317,689,669.92
  5. Step 5: Solve for x
    x = 317,689,669.92/20,604.36
  6. Step 6: Final answer
    x = 15,418.57

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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.