Home / 3,909.90-5,395.50-2,141.48

Finding the Fourth Proportional to 3,909.90, 5,395.50 and 2,141.48

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Solution

The fourth proportional to 3,909.90, 5,395.50 and 2,141.48 is: 2,955.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.90 : 5,395.50 = 2,141.48 : x
  2. Step 2: Convert to fraction form
    3,909.90/5,395.50 = 2,141.48/x
  3. Step 3: Cross multiply
    3,909.90x = 5,395.50 × 2,141.48
  4. Step 4: Simplify right side
    3,909.90x = 11,554,328.36
  5. Step 5: Solve for x
    x = 11,554,328.36/3,909.90
  6. Step 6: Final answer
    x = 2,955.15

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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.