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Finding the Fourth Proportional to 25,893.74, 35,719.35 and 21,390.86

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Solution

The fourth proportional to 25,893.74, 35,719.35 and 21,390.86 is: 29,507.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,893.74 : 35,719.35 = 21,390.86 : x
  2. Step 2: Convert to fraction form
    25,893.74/35,719.35 = 21,390.86/x
  3. Step 3: Cross multiply
    25,893.74x = 35,719.35 × 21,390.86
  4. Step 4: Simplify right side
    25,893.74x = 764,067,615.14
  5. Step 5: Solve for x
    x = 764,067,615.14/25,893.74
  6. Step 6: Final answer
    x = 29,507.81

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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.