Home / 5,156.99-7,121.39-4,880.78

Finding the Fourth Proportional to 5,156.99, 7,121.39 and 4,880.78

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Solution

The fourth proportional to 5,156.99, 7,121.39 and 4,880.78 is: 6,739.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.99 : 7,121.39 = 4,880.78 : x
  2. Step 2: Convert to fraction form
    5,156.99/7,121.39 = 4,880.78/x
  3. Step 3: Cross multiply
    5,156.99x = 7,121.39 × 4,880.78
  4. Step 4: Simplify right side
    5,156.99x = 34,757,877.87
  5. Step 5: Solve for x
    x = 34,757,877.87/5,156.99
  6. Step 6: Final answer
    x = 6,739.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.