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Finding the Fourth Proportional to 30,405.90, 41,960.79 and 19,075.83

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Solution

The fourth proportional to 30,405.90, 41,960.79 and 19,075.83 is: 26,325.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,405.90 : 41,960.79 = 19,075.83 : x
  2. Step 2: Convert to fraction form
    30,405.90/41,960.79 = 19,075.83/x
  3. Step 3: Cross multiply
    30,405.90x = 41,960.79 × 19,075.83
  4. Step 4: Simplify right side
    30,405.90x = 800,436,896.71
  5. Step 5: Solve for x
    x = 800,436,896.71/30,405.90
  6. Step 6: Final answer
    x = 26,325.05

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.