Home / 3,138.81-4,330.19-1,943.48

Finding the Fourth Proportional to 3,138.81, 4,330.19 and 1,943.48

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Solution

The fourth proportional to 3,138.81, 4,330.19 and 1,943.48 is: 2,681.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.81 : 4,330.19 = 1,943.48 : x
  2. Step 2: Convert to fraction form
    3,138.81/4,330.19 = 1,943.48/x
  3. Step 3: Cross multiply
    3,138.81x = 4,330.19 × 1,943.48
  4. Step 4: Simplify right side
    3,138.81x = 8,415,616.01
  5. Step 5: Solve for x
    x = 8,415,616.01/3,138.81
  6. Step 6: Final answer
    x = 2,681.15

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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.