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Finding the Fourth Proportional to 18,126.69, 27,190.35 and 4,978.98

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Solution

The fourth proportional to 18,126.69, 27,190.35 and 4,978.98 is: 7,468.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,126.69 : 27,190.35 = 4,978.98 : x
  2. Step 2: Convert to fraction form
    18,126.69/27,190.35 = 4,978.98/x
  3. Step 3: Cross multiply
    18,126.69x = 27,190.35 × 4,978.98
  4. Step 4: Simplify right side
    18,126.69x = 135,380,208.84
  5. Step 5: Solve for x
    x = 135,380,208.84/18,126.69
  6. Step 6: Final answer
    x = 7,468.56

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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.