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Finding the Fourth Proportional to 13,850.91, 20,773.87 and 3,987.77

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Solution

The fourth proportional to 13,850.91, 20,773.87 and 3,987.77 is: 5,980.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,850.91 : 20,773.87 = 3,987.77 : x
  2. Step 2: Convert to fraction form
    13,850.91/20,773.87 = 3,987.77/x
  3. Step 3: Cross multiply
    13,850.91x = 20,773.87 × 3,987.77
  4. Step 4: Simplify right side
    13,850.91x = 82,841,301.73
  5. Step 5: Solve for x
    x = 82,841,301.73/13,850.91
  6. Step 6: Final answer
    x = 5,980.93

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1.5x scale

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.