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Finding the Fourth Proportional to 11,721.69, 16,176.47 and 7,241.99

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Solution

The fourth proportional to 11,721.69, 16,176.47 and 7,241.99 is: 9,994.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,721.69 : 16,176.47 = 7,241.99 : x
  2. Step 2: Convert to fraction form
    11,721.69/16,176.47 = 7,241.99/x
  3. Step 3: Cross multiply
    11,721.69x = 16,176.47 × 7,241.99
  4. Step 4: Simplify right side
    11,721.69x = 117,149,716.88
  5. Step 5: Solve for x
    x = 117,149,716.88/11,721.69
  6. Step 6: Final answer
    x = 9,994.27

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1.5x scale

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.