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Finding the Fourth Proportional to 5,129.22, 7,695 and 1,666.46

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Solution

The fourth proportional to 5,129.22, 7,695 and 1,666.46 is: 2,500.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.22 : 7,695 = 1,666.46 : x
  2. Step 2: Convert to fraction form
    5,129.22/7,695 = 1,666.46/x
  3. Step 3: Cross multiply
    5,129.22x = 7,695 × 1,666.46
  4. Step 4: Simplify right side
    5,129.22x = 12,823,409.70
  5. Step 5: Solve for x
    x = 12,823,409.70/5,129.22
  6. Step 6: Final answer
    x = 2,500.07

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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.