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Finding the Fourth Proportional to 12,447.84, 17,181.12 and 8,671.60

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Solution

The fourth proportional to 12,447.84, 17,181.12 and 8,671.60 is: 11,968.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,447.84 : 17,181.12 = 8,671.60 : x
  2. Step 2: Convert to fraction form
    12,447.84/17,181.12 = 8,671.60/x
  3. Step 3: Cross multiply
    12,447.84x = 17,181.12 × 8,671.60
  4. Step 4: Simplify right side
    12,447.84x = 148,987,800.19
  5. Step 5: Solve for x
    x = 148,987,800.19/12,447.84
  6. Step 6: Final answer
    x = 11,968.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.