Home / 8,579.20-12,868.80-6,851.20

Finding the Fourth Proportional to 8,579.20, 12,868.80 and 6,851.20

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Solution

The fourth proportional to 8,579.20, 12,868.80 and 6,851.20 is: 10,276.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,579.20 : 12,868.80 = 6,851.20 : x
  2. Step 2: Convert to fraction form
    8,579.20/12,868.80 = 6,851.20/x
  3. Step 3: Cross multiply
    8,579.20x = 12,868.80 × 6,851.20
  4. Step 4: Simplify right side
    8,579.20x = 88,166,722.56
  5. Step 5: Solve for x
    x = 88,166,722.56/8,579.20
  6. Step 6: Final answer
    x = 10,276.80

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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.