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Finding the Fourth Proportional to 8,642.37, 12,965.45 and 2,799.57

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Solution

The fourth proportional to 8,642.37, 12,965.45 and 2,799.57 is: 4,199.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.37 : 12,965.45 = 2,799.57 : x
  2. Step 2: Convert to fraction form
    8,642.37/12,965.45 = 2,799.57/x
  3. Step 3: Cross multiply
    8,642.37x = 12,965.45 × 2,799.57
  4. Step 4: Simplify right side
    8,642.37x = 36,297,684.86
  5. Step 5: Solve for x
    x = 36,297,684.86/8,642.37
  6. Step 6: Final answer
    x = 4,199.97

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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.