Home / 5,420.91-8,131.59-1,723.05

Finding the Fourth Proportional to 5,420.91, 8,131.59 and 1,723.05

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Solution

The fourth proportional to 5,420.91, 8,131.59 and 1,723.05 is: 2,584.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.91 : 8,131.59 = 1,723.05 : x
  2. Step 2: Convert to fraction form
    5,420.91/8,131.59 = 1,723.05/x
  3. Step 3: Cross multiply
    5,420.91x = 8,131.59 × 1,723.05
  4. Step 4: Simplify right side
    5,420.91x = 14,011,136.15
  5. Step 5: Solve for x
    x = 14,011,136.15/5,420.91
  6. Step 6: Final answer
    x = 2,584.65

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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.