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Finding the Fourth Proportional to 40,286.64, 60,423.72 and 20,579.76

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Solution

The fourth proportional to 40,286.64, 60,423.72 and 20,579.76 is: 30,866.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,286.64 : 60,423.72 = 20,579.76 : x
  2. Step 2: Convert to fraction form
    40,286.64/60,423.72 = 20,579.76/x
  3. Step 3: Cross multiply
    40,286.64x = 60,423.72 × 20,579.76
  4. Step 4: Simplify right side
    40,286.64x = 1,243,505,655.91
  5. Step 5: Solve for x
    x = 1,243,505,655.91/40,286.64
  6. Step 6: Final answer
    x = 30,866.45

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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.