Home / 8,385.15-12,579.63-2,838.15

Finding the Fourth Proportional to 8,385.15, 12,579.63 and 2,838.15

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Solution

The fourth proportional to 8,385.15, 12,579.63 and 2,838.15 is: 4,257.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,385.15 : 12,579.63 = 2,838.15 : x
  2. Step 2: Convert to fraction form
    8,385.15/12,579.63 = 2,838.15/x
  3. Step 3: Cross multiply
    8,385.15x = 12,579.63 × 2,838.15
  4. Step 4: Simplify right side
    8,385.15x = 35,702,876.88
  5. Step 5: Solve for x
    x = 35,702,876.88/8,385.15
  6. Step 6: Final answer
    x = 4,257.87

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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.