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Finding the Fourth Proportional to 36,168.88, 49,915.80 and 20,857.90

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Solution

The fourth proportional to 36,168.88, 49,915.80 and 20,857.90 is: 28,785.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,168.88 : 49,915.80 = 20,857.90 : x
  2. Step 2: Convert to fraction form
    36,168.88/49,915.80 = 20,857.90/x
  3. Step 3: Cross multiply
    36,168.88x = 49,915.80 × 20,857.90
  4. Step 4: Simplify right side
    36,168.88x = 1,041,138,764.82
  5. Step 5: Solve for x
    x = 1,041,138,764.82/36,168.88
  6. Step 6: Final answer
    x = 28,785.49

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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.