Home / 5,405.25-8,108.15-5,121.21

Finding the Fourth Proportional to 5,405.25, 8,108.15 and 5,121.21

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Solution

The fourth proportional to 5,405.25, 8,108.15 and 5,121.21 is: 7,682.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,405.25 : 8,108.15 = 5,121.21 : x
  2. Step 2: Convert to fraction form
    5,405.25/8,108.15 = 5,121.21/x
  3. Step 3: Cross multiply
    5,405.25x = 8,108.15 × 5,121.21
  4. Step 4: Simplify right side
    5,405.25x = 41,523,513.26
  5. Step 5: Solve for x
    x = 41,523,513.26/5,405.25
  6. Step 6: Final answer
    x = 7,682.07

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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.