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Finding the Fourth Proportional to 28,765.68, 43,133.94 and 13,169.94

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Solution

The fourth proportional to 28,765.68, 43,133.94 and 13,169.94 is: 19,748.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,765.68 : 43,133.94 = 13,169.94 : x
  2. Step 2: Convert to fraction form
    28,765.68/43,133.94 = 13,169.94/x
  3. Step 3: Cross multiply
    28,765.68x = 43,133.94 × 13,169.94
  4. Step 4: Simplify right side
    28,765.68x = 568,071,401.76
  5. Step 5: Solve for x
    x = 568,071,401.76/28,765.68
  6. Step 6: Final answer
    x = 19,748.23

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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.