Home / 3,128.11-4,316.69-1,711.80

Finding the Fourth Proportional to 3,128.11, 4,316.69 and 1,711.80

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Solution

The fourth proportional to 3,128.11, 4,316.69 and 1,711.80 is: 2,362.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.11 : 4,316.69 = 1,711.80 : x
  2. Step 2: Convert to fraction form
    3,128.11/4,316.69 = 1,711.80/x
  3. Step 3: Cross multiply
    3,128.11x = 4,316.69 × 1,711.80
  4. Step 4: Simplify right side
    3,128.11x = 7,389,314.22
  5. Step 5: Solve for x
    x = 7,389,314.22/3,128.11
  6. Step 6: Final answer
    x = 2,362.23

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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.