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Finding the Fourth Proportional to 7,090.29, 9,784.21 and 3,902.96

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Solution

The fourth proportional to 7,090.29, 9,784.21 and 3,902.96 is: 5,385.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,090.29 : 9,784.21 = 3,902.96 : x
  2. Step 2: Convert to fraction form
    7,090.29/9,784.21 = 3,902.96/x
  3. Step 3: Cross multiply
    7,090.29x = 9,784.21 × 3,902.96
  4. Step 4: Simplify right side
    7,090.29x = 38,187,380.26
  5. Step 5: Solve for x
    x = 38,187,380.26/7,090.29
  6. Step 6: Final answer
    x = 5,385.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.