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Finding the Fourth Proportional to 13,996.49, 20,997.90 and 4,636.49

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Solution

The fourth proportional to 13,996.49, 20,997.90 and 4,636.49 is: 6,955.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,996.49 : 20,997.90 = 4,636.49 : x
  2. Step 2: Convert to fraction form
    13,996.49/20,997.90 = 4,636.49/x
  3. Step 3: Cross multiply
    13,996.49x = 20,997.90 × 4,636.49
  4. Step 4: Simplify right side
    13,996.49x = 97,356,448.38
  5. Step 5: Solve for x
    x = 97,356,448.38/13,996.49
  6. Step 6: Final answer
    x = 6,955.78

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1.5x scale

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.