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Finding the Fourth Proportional to 8,665.72, 12,994.26 and 2,820.76

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Solution

The fourth proportional to 8,665.72, 12,994.26 and 2,820.76 is: 4,229.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.72 : 12,994.26 = 2,820.76 : x
  2. Step 2: Convert to fraction form
    8,665.72/12,994.26 = 2,820.76/x
  3. Step 3: Cross multiply
    8,665.72x = 12,994.26 × 2,820.76
  4. Step 4: Simplify right side
    8,665.72x = 36,653,688.84
  5. Step 5: Solve for x
    x = 36,653,688.84/8,665.72
  6. Step 6: Final answer
    x = 4,229.73

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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.