Home / 10,815.75-16,223.52-3,420.21

Finding the Fourth Proportional to 10,815.75, 16,223.52 and 3,420.21

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Solution

The fourth proportional to 10,815.75, 16,223.52 and 3,420.21 is: 5,130.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,815.75 : 16,223.52 = 3,420.21 : x
  2. Step 2: Convert to fraction form
    10,815.75/16,223.52 = 3,420.21/x
  3. Step 3: Cross multiply
    10,815.75x = 16,223.52 × 3,420.21
  4. Step 4: Simplify right side
    10,815.75x = 55,487,845.34
  5. Step 5: Solve for x
    x = 55,487,845.34/10,815.75
  6. Step 6: Final answer
    x = 5,130.28

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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.