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Finding the Fourth Proportional to 8,519.63, 12,780.65 and 2,279.84

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Solution

The fourth proportional to 8,519.63, 12,780.65 and 2,279.84 is: 3,420.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,519.63 : 12,780.65 = 2,279.84 : x
  2. Step 2: Convert to fraction form
    8,519.63/12,780.65 = 2,279.84/x
  3. Step 3: Cross multiply
    8,519.63x = 12,780.65 × 2,279.84
  4. Step 4: Simplify right side
    8,519.63x = 29,137,778.89
  5. Step 5: Solve for x
    x = 29,137,778.89/8,519.63
  6. Step 6: Final answer
    x = 3,420.08

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1.5x scale

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.