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Finding the Fourth Proportional to 12,902.36, 19,334.97 and 9,929.25

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Solution

The fourth proportional to 12,902.36, 19,334.97 and 9,929.25 is: 14,879.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,902.36 : 19,334.97 = 9,929.25 : x
  2. Step 2: Convert to fraction form
    12,902.36/19,334.97 = 9,929.25/x
  3. Step 3: Cross multiply
    12,902.36x = 19,334.97 × 9,929.25
  4. Step 4: Simplify right side
    12,902.36x = 191,981,750.87
  5. Step 5: Solve for x
    x = 191,981,750.87/12,902.36
  6. Step 6: Final answer
    x = 14,879.59

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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.