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Finding the Fourth Proportional to 12,486.90, 17,235.54 and 8,241.06

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Solution

The fourth proportional to 12,486.90, 17,235.54 and 8,241.06 is: 11,375.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.90 : 17,235.54 = 8,241.06 : x
  2. Step 2: Convert to fraction form
    12,486.90/17,235.54 = 8,241.06/x
  3. Step 3: Cross multiply
    12,486.90x = 17,235.54 × 8,241.06
  4. Step 4: Simplify right side
    12,486.90x = 142,039,119.27
  5. Step 5: Solve for x
    x = 142,039,119.27/12,486.90
  6. Step 6: Final answer
    x = 11,375.05

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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.