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Finding the Fourth Proportional to 37,579.64, 51,861.54 and 20,812.64

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Solution

The fourth proportional to 37,579.64, 51,861.54 and 20,812.64 is: 28,722.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,579.64 : 51,861.54 = 20,812.64 : x
  2. Step 2: Convert to fraction form
    37,579.64/51,861.54 = 20,812.64/x
  3. Step 3: Cross multiply
    37,579.64x = 51,861.54 × 20,812.64
  4. Step 4: Simplify right side
    37,579.64x = 1,079,375,561.87
  5. Step 5: Solve for x
    x = 1,079,375,561.87/37,579.64
  6. Step 6: Final answer
    x = 28,722.35

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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.