Home / 3,428.60-5,134.80-2,116.40

Finding the Fourth Proportional to 3,428.60, 5,134.80 and 2,116.40

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Solution

The fourth proportional to 3,428.60, 5,134.80 and 2,116.40 is: 3,169.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.60 : 5,134.80 = 2,116.40 : x
  2. Step 2: Convert to fraction form
    3,428.60/5,134.80 = 2,116.40/x
  3. Step 3: Cross multiply
    3,428.60x = 5,134.80 × 2,116.40
  4. Step 4: Simplify right side
    3,428.60x = 10,867,290.72
  5. Step 5: Solve for x
    x = 10,867,290.72/3,428.60
  6. Step 6: Final answer
    x = 3,169.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.