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Finding the Fourth Proportional to 36,099.78, 49,797.69 and 20,990.78

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Solution

The fourth proportional to 36,099.78, 49,797.69 and 20,990.78 is: 28,955.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,099.78 : 49,797.69 = 20,990.78 : x
  2. Step 2: Convert to fraction form
    36,099.78/49,797.69 = 20,990.78/x
  3. Step 3: Cross multiply
    36,099.78x = 49,797.69 × 20,990.78
  4. Step 4: Simplify right side
    36,099.78x = 1,045,292,106.31
  5. Step 5: Solve for x
    x = 1,045,292,106.31/36,099.78
  6. Step 6: Final answer
    x = 28,955.64

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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.