Home / 5,429.60-8,145.30-2,142.80

Finding the Fourth Proportional to 5,429.60, 8,145.30 and 2,142.80

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Solution

The fourth proportional to 5,429.60, 8,145.30 and 2,142.80 is: 3,214.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,429.60 : 8,145.30 = 2,142.80 : x
  2. Step 2: Convert to fraction form
    5,429.60/8,145.30 = 2,142.80/x
  3. Step 3: Cross multiply
    5,429.60x = 8,145.30 × 2,142.80
  4. Step 4: Simplify right side
    5,429.60x = 17,453,748.84
  5. Step 5: Solve for x
    x = 17,453,748.84/5,429.60
  6. Step 6: Final answer
    x = 3,214.56

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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.