Home / 3,928.38-5,421.63-2,357.34

Finding the Fourth Proportional to 3,928.38, 5,421.63 and 2,357.34

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Solution

The fourth proportional to 3,928.38, 5,421.63 and 2,357.34 is: 3,253.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.38 : 5,421.63 = 2,357.34 : x
  2. Step 2: Convert to fraction form
    3,928.38/5,421.63 = 2,357.34/x
  3. Step 3: Cross multiply
    3,928.38x = 5,421.63 × 2,357.34
  4. Step 4: Simplify right side
    3,928.38x = 12,780,625.26
  5. Step 5: Solve for x
    x = 12,780,625.26/3,928.38
  6. Step 6: Final answer
    x = 3,253.41

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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.