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Finding the Fourth Proportional to 8,645.59, 12,965.11 and 2,800.63

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Solution

The fourth proportional to 8,645.59, 12,965.11 and 2,800.63 is: 4,199.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.59 : 12,965.11 = 2,800.63 : x
  2. Step 2: Convert to fraction form
    8,645.59/12,965.11 = 2,800.63/x
  3. Step 3: Cross multiply
    8,645.59x = 12,965.11 × 2,800.63
  4. Step 4: Simplify right side
    8,645.59x = 36,310,476.02
  5. Step 5: Solve for x
    x = 36,310,476.02/8,645.59
  6. Step 6: Final answer
    x = 4,199.88

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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.