Home / 3,909.95-5,395.74-2,141.59

Finding the Fourth Proportional to 3,909.95, 5,395.74 and 2,141.59

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Solution

The fourth proportional to 3,909.95, 5,395.74 and 2,141.59 is: 2,955.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.95 : 5,395.74 = 2,141.59 : x
  2. Step 2: Convert to fraction form
    3,909.95/5,395.74 = 2,141.59/x
  3. Step 3: Cross multiply
    3,909.95x = 5,395.74 × 2,141.59
  4. Step 4: Simplify right side
    3,909.95x = 11,555,457.45
  5. Step 5: Solve for x
    x = 11,555,457.45/3,909.95
  6. Step 6: Final answer
    x = 2,955.40

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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.