Home / 10,815.81-16,217.64-3,422.13

Finding the Fourth Proportional to 10,815.81, 16,217.64 and 3,422.13

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Solution

The fourth proportional to 10,815.81, 16,217.64 and 3,422.13 is: 5,131.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,815.81 : 16,217.64 = 3,422.13 : x
  2. Step 2: Convert to fraction form
    10,815.81/16,217.64 = 3,422.13/x
  3. Step 3: Cross multiply
    10,815.81x = 16,217.64 × 3,422.13
  4. Step 4: Simplify right side
    10,815.81x = 55,498,872.37
  5. Step 5: Solve for x
    x = 55,498,872.37/10,815.81
  6. Step 6: Final answer
    x = 5,131.27

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1.5x scale

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.