Home / 4,074.50-5,621.07-3,128.66

Finding the Fourth Proportional to 4,074.50, 5,621.07 and 3,128.66

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Solution

The fourth proportional to 4,074.50, 5,621.07 and 3,128.66 is: 4,316.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,074.50 : 5,621.07 = 3,128.66 : x
  2. Step 2: Convert to fraction form
    4,074.50/5,621.07 = 3,128.66/x
  3. Step 3: Cross multiply
    4,074.50x = 5,621.07 × 3,128.66
  4. Step 4: Simplify right side
    4,074.50x = 17,586,416.87
  5. Step 5: Solve for x
    x = 17,586,416.87/4,074.50
  6. Step 6: Final answer
    x = 4,316.21

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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.