Home / 10,815.55-16,224.87-3,420.55

Finding the Fourth Proportional to 10,815.55, 16,224.87 and 3,420.55

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Solution

The fourth proportional to 10,815.55, 16,224.87 and 3,420.55 is: 5,131.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,815.55 : 16,224.87 = 3,420.55 : x
  2. Step 2: Convert to fraction form
    10,815.55/16,224.87 = 3,420.55/x
  3. Step 3: Cross multiply
    10,815.55x = 16,224.87 × 3,420.55
  4. Step 4: Simplify right side
    10,815.55x = 55,497,979.08
  5. Step 5: Solve for x
    x = 55,497,979.08/10,815.55
  6. Step 6: Final answer
    x = 5,131.31

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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.