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Finding the Fourth Proportional to 19,163.13, 28,748.34 and 7,475.45

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Solution

The fourth proportional to 19,163.13, 28,748.34 and 7,475.45 is: 11,214.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,163.13 : 28,748.34 = 7,475.45 : x
  2. Step 2: Convert to fraction form
    19,163.13/28,748.34 = 7,475.45/x
  3. Step 3: Cross multiply
    19,163.13x = 28,748.34 × 7,475.45
  4. Step 4: Simplify right side
    19,163.13x = 214,906,634.51
  5. Step 5: Solve for x
    x = 214,906,634.51/19,163.13
  6. Step 6: Final answer
    x = 11,214.59

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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.