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Finding the Fourth Proportional to 18,291.20, 27,415.20 and 7,761.20

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Solution

The fourth proportional to 18,291.20, 27,415.20 and 7,761.20 is: 11,632.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,291.20 : 27,415.20 = 7,761.20 : x
  2. Step 2: Convert to fraction form
    18,291.20/27,415.20 = 7,761.20/x
  3. Step 3: Cross multiply
    18,291.20x = 27,415.20 × 7,761.20
  4. Step 4: Simplify right side
    18,291.20x = 212,774,850.24
  5. Step 5: Solve for x
    x = 212,774,850.24/18,291.20
  6. Step 6: Final answer
    x = 11,632.63

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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.