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Finding the Fourth Proportional to 12,755.87, 19,040.17 and 11,816.50

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Solution

The fourth proportional to 12,755.87, 19,040.17 and 11,816.50 is: 17,638.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,755.87 : 19,040.17 = 11,816.50 : x
  2. Step 2: Convert to fraction form
    12,755.87/19,040.17 = 11,816.50/x
  3. Step 3: Cross multiply
    12,755.87x = 19,040.17 × 11,816.50
  4. Step 4: Simplify right side
    12,755.87x = 224,988,168.81
  5. Step 5: Solve for x
    x = 224,988,168.81/12,755.87
  6. Step 6: Final answer
    x = 17,638.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.