Home / 3,128.15-4,316.67-1,711.57

Finding the Fourth Proportional to 3,128.15, 4,316.67 and 1,711.57

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Solution

The fourth proportional to 3,128.15, 4,316.67 and 1,711.57 is: 2,361.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.15 : 4,316.67 = 1,711.57 : x
  2. Step 2: Convert to fraction form
    3,128.15/4,316.67 = 1,711.57/x
  3. Step 3: Cross multiply
    3,128.15x = 4,316.67 × 1,711.57
  4. Step 4: Simplify right side
    3,128.15x = 7,388,282.87
  5. Step 5: Solve for x
    x = 7,388,282.87/3,128.15
  6. Step 6: Final answer
    x = 2,361.87

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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.