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Finding the Fourth Proportional to 12,919.62, 17,838.99 and 9,391.26

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Solution

The fourth proportional to 12,919.62, 17,838.99 and 9,391.26 is: 12,967.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,919.62 : 17,838.99 = 9,391.26 : x
  2. Step 2: Convert to fraction form
    12,919.62/17,838.99 = 9,391.26/x
  3. Step 3: Cross multiply
    12,919.62x = 17,838.99 × 9,391.26
  4. Step 4: Simplify right side
    12,919.62x = 167,530,593.23
  5. Step 5: Solve for x
    x = 167,530,593.23/12,919.62
  6. Step 6: Final answer
    x = 12,967.15

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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.