Home / 5,121.60-7,682.32-1,423.80

Finding the Fourth Proportional to 5,121.60, 7,682.32 and 1,423.80

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Solution

The fourth proportional to 5,121.60, 7,682.32 and 1,423.80 is: 2,135.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.60 : 7,682.32 = 1,423.80 : x
  2. Step 2: Convert to fraction form
    5,121.60/7,682.32 = 1,423.80/x
  3. Step 3: Cross multiply
    5,121.60x = 7,682.32 × 1,423.80
  4. Step 4: Simplify right side
    5,121.60x = 10,938,087.22
  5. Step 5: Solve for x
    x = 10,938,087.22/5,121.60
  6. Step 6: Final answer
    x = 2,135.68

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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.