Home / 3,187.47-4,399.64-2,126.78

Finding the Fourth Proportional to 3,187.47, 4,399.64 and 2,126.78

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Solution

The fourth proportional to 3,187.47, 4,399.64 and 2,126.78 is: 2,935.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.47 : 4,399.64 = 2,126.78 : x
  2. Step 2: Convert to fraction form
    3,187.47/4,399.64 = 2,126.78/x
  3. Step 3: Cross multiply
    3,187.47x = 4,399.64 × 2,126.78
  4. Step 4: Simplify right side
    3,187.47x = 9,357,033.73
  5. Step 5: Solve for x
    x = 9,357,033.73/3,187.47
  6. Step 6: Final answer
    x = 2,935.57

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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.