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Finding the Fourth Proportional to 8,447.19, 12,670.78 and 2,291.19

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Solution

The fourth proportional to 8,447.19, 12,670.78 and 2,291.19 is: 3,436.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,447.19 : 12,670.78 = 2,291.19 : x
  2. Step 2: Convert to fraction form
    8,447.19/12,670.78 = 2,291.19/x
  3. Step 3: Cross multiply
    8,447.19x = 12,670.78 × 2,291.19
  4. Step 4: Simplify right side
    8,447.19x = 29,031,164.43
  5. Step 5: Solve for x
    x = 29,031,164.43/8,447.19
  6. Step 6: Final answer
    x = 3,436.78

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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.