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Finding the Fourth Proportional to 36,419.76, 50,243.64 and 20,889.12

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Solution

The fourth proportional to 36,419.76, 50,243.64 and 20,889.12 is: 28,818.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,419.76 : 50,243.64 = 20,889.12 : x
  2. Step 2: Convert to fraction form
    36,419.76/50,243.64 = 20,889.12/x
  3. Step 3: Cross multiply
    36,419.76x = 50,243.64 × 20,889.12
  4. Step 4: Simplify right side
    36,419.76x = 1,049,545,425.20
  5. Step 5: Solve for x
    x = 1,049,545,425.20/36,419.76
  6. Step 6: Final answer
    x = 28,818.02

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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.