Home / 2,989.81-4,131.62-2,242.47

Finding the Fourth Proportional to 2,989.81, 4,131.62 and 2,242.47

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Solution

The fourth proportional to 2,989.81, 4,131.62 and 2,242.47 is: 3,098.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.81 : 4,131.62 = 2,242.47 : x
  2. Step 2: Convert to fraction form
    2,989.81/4,131.62 = 2,242.47/x
  3. Step 3: Cross multiply
    2,989.81x = 4,131.62 × 2,242.47
  4. Step 4: Simplify right side
    2,989.81x = 9,265,027.78
  5. Step 5: Solve for x
    x = 9,265,027.78/2,989.81
  6. Step 6: Final answer
    x = 3,098.87

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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.