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Finding the Fourth Proportional to 56,391.66, 84,594.78 and 18,935.64

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Solution

The fourth proportional to 56,391.66, 84,594.78 and 18,935.64 is: 28,405.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,391.66 : 84,594.78 = 18,935.64 : x
  2. Step 2: Convert to fraction form
    56,391.66/84,594.78 = 18,935.64/x
  3. Step 3: Cross multiply
    56,391.66x = 84,594.78 × 18,935.64
  4. Step 4: Simplify right side
    56,391.66x = 1,601,856,299.96
  5. Step 5: Solve for x
    x = 1,601,856,299.96/56,391.66
  6. Step 6: Final answer
    x = 28,405.91

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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.