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Finding the Fourth Proportional to 12,716.60, 19,020.90 and 11,409.80

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Solution

The fourth proportional to 12,716.60, 19,020.90 and 11,409.80 is: 17,066.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,716.60 : 19,020.90 = 11,409.80 : x
  2. Step 2: Convert to fraction form
    12,716.60/19,020.90 = 11,409.80/x
  3. Step 3: Cross multiply
    12,716.60x = 19,020.90 × 11,409.80
  4. Step 4: Simplify right side
    12,716.60x = 217,024,664.82
  5. Step 5: Solve for x
    x = 217,024,664.82/12,716.60
  6. Step 6: Final answer
    x = 17,066.25

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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.