Home / 3,124.08-4,309.68-2,131.68

Finding the Fourth Proportional to 3,124.08, 4,309.68 and 2,131.68

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Solution

The fourth proportional to 3,124.08, 4,309.68 and 2,131.68 is: 2,940.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.08 : 4,309.68 = 2,131.68 : x
  2. Step 2: Convert to fraction form
    3,124.08/4,309.68 = 2,131.68/x
  3. Step 3: Cross multiply
    3,124.08x = 4,309.68 × 2,131.68
  4. Step 4: Simplify right side
    3,124.08x = 9,186,858.66
  5. Step 5: Solve for x
    x = 9,186,858.66/3,124.08
  6. Step 6: Final answer
    x = 2,940.66

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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.