Home / 3,521.60-5,282.40-2,139.20

Finding the Fourth Proportional to 3,521.60, 5,282.40 and 2,139.20

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Solution

The fourth proportional to 3,521.60, 5,282.40 and 2,139.20 is: 3,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,521.60 : 5,282.40 = 2,139.20 : x
  2. Step 2: Convert to fraction form
    3,521.60/5,282.40 = 2,139.20/x
  3. Step 3: Cross multiply
    3,521.60x = 5,282.40 × 2,139.20
  4. Step 4: Simplify right side
    3,521.60x = 11,300,110.08
  5. Step 5: Solve for x
    x = 11,300,110.08/3,521.60
  6. Step 6: Final answer
    x = 3,208.80

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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.