Home / 10,815.69-16,223.13-3,420.93

Finding the Fourth Proportional to 10,815.69, 16,223.13 and 3,420.93

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Solution

The fourth proportional to 10,815.69, 16,223.13 and 3,420.93 is: 5,131.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,815.69 : 16,223.13 = 3,420.93 : x
  2. Step 2: Convert to fraction form
    10,815.69/16,223.13 = 3,420.93/x
  3. Step 3: Cross multiply
    10,815.69x = 16,223.13 × 3,420.93
  4. Step 4: Simplify right side
    10,815.69x = 55,498,192.11
  5. Step 5: Solve for x
    x = 55,498,192.11/10,815.69
  6. Step 6: Final answer
    x = 5,131.27

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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.