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Finding the Fourth Proportional to 34,486.90, 51,716.68 and 11,990.87

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Solution

The fourth proportional to 34,486.90, 51,716.68 and 11,990.87 is: 17,981.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,486.90 : 51,716.68 = 11,990.87 : x
  2. Step 2: Convert to fraction form
    34,486.90/51,716.68 = 11,990.87/x
  3. Step 3: Cross multiply
    34,486.90x = 51,716.68 × 11,990.87
  4. Step 4: Simplify right side
    34,486.90x = 620,127,892.09
  5. Step 5: Solve for x
    x = 620,127,892.09/34,486.90
  6. Step 6: Final answer
    x = 17,981.55

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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.