Home / 3,121.53-4,700.76-2,715.57

Finding the Fourth Proportional to 3,121.53, 4,700.76 and 2,715.57

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Solution

The fourth proportional to 3,121.53, 4,700.76 and 2,715.57 is: 4,089.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.53 : 4,700.76 = 2,715.57 : x
  2. Step 2: Convert to fraction form
    3,121.53/4,700.76 = 2,715.57/x
  3. Step 3: Cross multiply
    3,121.53x = 4,700.76 × 2,715.57
  4. Step 4: Simplify right side
    3,121.53x = 12,765,242.83
  5. Step 5: Solve for x
    x = 12,765,242.83/3,121.53
  6. Step 6: Final answer
    x = 4,089.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.