Home / 5,415.15-8,121.51-2,490.65

Finding the Fourth Proportional to 5,415.15, 8,121.51 and 2,490.65

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Solution

The fourth proportional to 5,415.15, 8,121.51 and 2,490.65 is: 3,735.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.15 : 8,121.51 = 2,490.65 : x
  2. Step 2: Convert to fraction form
    5,415.15/8,121.51 = 2,490.65/x
  3. Step 3: Cross multiply
    5,415.15x = 8,121.51 × 2,490.65
  4. Step 4: Simplify right side
    5,415.15x = 20,227,838.88
  5. Step 5: Solve for x
    x = 20,227,838.88/5,415.15
  6. Step 6: Final answer
    x = 3,735.42

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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.