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Finding the Fourth Proportional to 33,109.70, 49,664.55 and 19,987.70

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Solution

The fourth proportional to 33,109.70, 49,664.55 and 19,987.70 is: 29,981.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,109.70 : 49,664.55 = 19,987.70 : x
  2. Step 2: Convert to fraction form
    33,109.70/49,664.55 = 19,987.70/x
  3. Step 3: Cross multiply
    33,109.70x = 49,664.55 × 19,987.70
  4. Step 4: Simplify right side
    33,109.70x = 992,680,126.04
  5. Step 5: Solve for x
    x = 992,680,126.04/33,109.70
  6. Step 6: Final answer
    x = 29,981.55

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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.