Home / 3,909.61-5,395.26-2,141.20

Finding the Fourth Proportional to 3,909.61, 5,395.26 and 2,141.20

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Solution

The fourth proportional to 3,909.61, 5,395.26 and 2,141.20 is: 2,954.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.61 : 5,395.26 = 2,141.20 : x
  2. Step 2: Convert to fraction form
    3,909.61/5,395.26 = 2,141.20/x
  3. Step 3: Cross multiply
    3,909.61x = 5,395.26 × 2,141.20
  4. Step 4: Simplify right side
    3,909.61x = 11,552,330.71
  5. Step 5: Solve for x
    x = 11,552,330.71/3,909.61
  6. Step 6: Final answer
    x = 2,954.86

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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.