Home / 3,417.60-5,126.40-2,121.60

Finding the Fourth Proportional to 3,417.60, 5,126.40 and 2,121.60

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Solution

The fourth proportional to 3,417.60, 5,126.40 and 2,121.60 is: 3,182.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,417.60 : 5,126.40 = 2,121.60 : x
  2. Step 2: Convert to fraction form
    3,417.60/5,126.40 = 2,121.60/x
  3. Step 3: Cross multiply
    3,417.60x = 5,126.40 × 2,121.60
  4. Step 4: Simplify right side
    3,417.60x = 10,876,170.24
  5. Step 5: Solve for x
    x = 10,876,170.24/3,417.60
  6. Step 6: Final answer
    x = 3,182.40

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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.