Home / 10,813.20-16,219.64-3,418.20

Finding the Fourth Proportional to 10,813.20, 16,219.64 and 3,418.20

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Solution

The fourth proportional to 10,813.20, 16,219.64 and 3,418.20 is: 5,127.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,813.20 : 16,219.64 = 3,418.20 : x
  2. Step 2: Convert to fraction form
    10,813.20/16,219.64 = 3,418.20/x
  3. Step 3: Cross multiply
    10,813.20x = 16,219.64 × 3,418.20
  4. Step 4: Simplify right side
    10,813.20x = 55,441,981.99
  5. Step 5: Solve for x
    x = 55,441,981.99/10,813.20
  6. Step 6: Final answer
    x = 5,127.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.