Home / 5,420.15-8,131.13-1,722.09

Finding the Fourth Proportional to 5,420.15, 8,131.13 and 1,722.09

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Solution

The fourth proportional to 5,420.15, 8,131.13 and 1,722.09 is: 2,583.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.15 : 8,131.13 = 1,722.09 : x
  2. Step 2: Convert to fraction form
    5,420.15/8,131.13 = 1,722.09/x
  3. Step 3: Cross multiply
    5,420.15x = 8,131.13 × 1,722.09
  4. Step 4: Simplify right side
    5,420.15x = 14,002,529.05
  5. Step 5: Solve for x
    x = 14,002,529.05/5,420.15
  6. Step 6: Final answer
    x = 2,583.42

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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.