Home / 33,138.84-45,733.20-18,991.72

Finding the Fourth Proportional to 33,138.84, 45,733.20 and 18,991.72

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Solution

The fourth proportional to 33,138.84, 45,733.20 and 18,991.72 is: 26,209.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,138.84 : 45,733.20 = 18,991.72 : x
  2. Step 2: Convert to fraction form
    33,138.84/45,733.20 = 18,991.72/x
  3. Step 3: Cross multiply
    33,138.84x = 45,733.20 × 18,991.72
  4. Step 4: Simplify right side
    33,138.84x = 868,552,129.10
  5. Step 5: Solve for x
    x = 868,552,129.10/33,138.84
  6. Step 6: Final answer
    x = 26,209.49

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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.