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Finding the Fourth Proportional to 12,151, 18,246.75 and 11,241.78

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Solution

The fourth proportional to 12,151, 18,246.75 and 11,241.78 is: 16,881.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,151 : 18,246.75 = 11,241.78 : x
  2. Step 2: Convert to fraction form
    12,151/18,246.75 = 11,241.78/x
  3. Step 3: Cross multiply
    12,151x = 18,246.75 × 11,241.78
  4. Step 4: Simplify right side
    12,151x = 205,125,949.22
  5. Step 5: Solve for x
    x = 205,125,949.22/12,151
  6. Step 6: Final answer
    x = 16,881.40

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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.