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Finding the Fourth Proportional to 33,133.72, 45,725.58 and 18,991

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Solution

The fourth proportional to 33,133.72, 45,725.58 and 18,991 is: 26,208.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,133.72 : 45,725.58 = 18,991 : x
  2. Step 2: Convert to fraction form
    33,133.72/45,725.58 = 18,991/x
  3. Step 3: Cross multiply
    33,133.72x = 45,725.58 × 18,991
  4. Step 4: Simplify right side
    33,133.72x = 868,374,489.78
  5. Step 5: Solve for x
    x = 868,374,489.78/33,133.72
  6. Step 6: Final answer
    x = 26,208.18

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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.