Home / 3,928.81-5,419.46-2,531.56

Finding the Fourth Proportional to 3,928.81, 5,419.46 and 2,531.56

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Solution

The fourth proportional to 3,928.81, 5,419.46 and 2,531.56 is: 3,492.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.81 : 5,419.46 = 2,531.56 : x
  2. Step 2: Convert to fraction form
    3,928.81/5,419.46 = 2,531.56/x
  3. Step 3: Cross multiply
    3,928.81x = 5,419.46 × 2,531.56
  4. Step 4: Simplify right side
    3,928.81x = 13,719,675.50
  5. Step 5: Solve for x
    x = 13,719,675.50/3,928.81
  6. Step 6: Final answer
    x = 3,492.07

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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.