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Finding the Fourth Proportional to 5,090.68, 7,636.82 and 2,169

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Solution

The fourth proportional to 5,090.68, 7,636.82 and 2,169 is: 3,253.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,090.68 : 7,636.82 = 2,169 : x
  2. Step 2: Convert to fraction form
    5,090.68/7,636.82 = 2,169/x
  3. Step 3: Cross multiply
    5,090.68x = 7,636.82 × 2,169
  4. Step 4: Simplify right side
    5,090.68x = 16,564,262.58
  5. Step 5: Solve for x
    x = 16,564,262.58/5,090.68
  6. Step 6: Final answer
    x = 3,253.84

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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.