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Finding the Fourth Proportional to 56,893.80, 85,319.10 and 18,935.85

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Solution

The fourth proportional to 56,893.80, 85,319.10 and 18,935.85 is: 28,396.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,893.80 : 85,319.10 = 18,935.85 : x
  2. Step 2: Convert to fraction form
    56,893.80/85,319.10 = 18,935.85/x
  3. Step 3: Cross multiply
    56,893.80x = 85,319.10 × 18,935.85
  4. Step 4: Simplify right side
    56,893.80x = 1,615,589,679.74
  5. Step 5: Solve for x
    x = 1,615,589,679.74/56,893.80
  6. Step 6: Final answer
    x = 28,396.59

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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.