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Finding the Fourth Proportional to 33,135.72, 45,728.34 and 18,993

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Solution

The fourth proportional to 33,135.72, 45,728.34 and 18,993 is: 26,210.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,135.72 : 45,728.34 = 18,993 : x
  2. Step 2: Convert to fraction form
    33,135.72/45,728.34 = 18,993/x
  3. Step 3: Cross multiply
    33,135.72x = 45,728.34 × 18,993
  4. Step 4: Simplify right side
    33,135.72x = 868,518,361.62
  5. Step 5: Solve for x
    x = 868,518,361.62/33,135.72
  6. Step 6: Final answer
    x = 26,210.94

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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.