Home / 6,814.40-10,221.60-2,919.20

Finding the Fourth Proportional to 6,814.40, 10,221.60 and 2,919.20

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Solution

The fourth proportional to 6,814.40, 10,221.60 and 2,919.20 is: 4,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,814.40 : 10,221.60 = 2,919.20 : x
  2. Step 2: Convert to fraction form
    6,814.40/10,221.60 = 2,919.20/x
  3. Step 3: Cross multiply
    6,814.40x = 10,221.60 × 2,919.20
  4. Step 4: Simplify right side
    6,814.40x = 29,838,894.72
  5. Step 5: Solve for x
    x = 29,838,894.72/6,814.40
  6. Step 6: Final answer
    x = 4,378.80

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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.