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Finding the Fourth Proportional to 7,173, 10,763.61 and 2,789.90

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Solution

The fourth proportional to 7,173, 10,763.61 and 2,789.90 is: 4,186.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,173 : 10,763.61 = 2,789.90 : x
  2. Step 2: Convert to fraction form
    7,173/10,763.61 = 2,789.90/x
  3. Step 3: Cross multiply
    7,173x = 10,763.61 × 2,789.90
  4. Step 4: Simplify right side
    7,173x = 30,029,341.72
  5. Step 5: Solve for x
    x = 30,029,341.72/7,173
  6. Step 6: Final answer
    x = 4,186.44

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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.