Home / 10,815.66-16,222.10-3,420.88

Finding the Fourth Proportional to 10,815.66, 16,222.10 and 3,420.88

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Solution

The fourth proportional to 10,815.66, 16,222.10 and 3,420.88 is: 5,130.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,815.66 : 16,222.10 = 3,420.88 : x
  2. Step 2: Convert to fraction form
    10,815.66/16,222.10 = 3,420.88/x
  3. Step 3: Cross multiply
    10,815.66x = 16,222.10 × 3,420.88
  4. Step 4: Simplify right side
    10,815.66x = 55,493,799.79
  5. Step 5: Solve for x
    x = 55,493,799.79/10,815.66
  6. Step 6: Final answer
    x = 5,130.88

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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.