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Finding the Fourth Proportional to 21,808.36, 30,094.50 and 12,375.64

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Solution

The fourth proportional to 21,808.36, 30,094.50 and 12,375.64 is: 17,077.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,808.36 : 30,094.50 = 12,375.64 : x
  2. Step 2: Convert to fraction form
    21,808.36/30,094.50 = 12,375.64/x
  3. Step 3: Cross multiply
    21,808.36x = 30,094.50 × 12,375.64
  4. Step 4: Simplify right side
    21,808.36x = 372,438,697.98
  5. Step 5: Solve for x
    x = 372,438,697.98/21,808.36
  6. Step 6: Final answer
    x = 17,077.79

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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.