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Finding the Fourth Proportional to 34,643.90, 51,985.90 and 18,850.57

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Solution

The fourth proportional to 34,643.90, 51,985.90 and 18,850.57 is: 28,286.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,643.90 : 51,985.90 = 18,850.57 : x
  2. Step 2: Convert to fraction form
    34,643.90/51,985.90 = 18,850.57/x
  3. Step 3: Cross multiply
    34,643.90x = 51,985.90 × 18,850.57
  4. Step 4: Simplify right side
    34,643.90x = 979,964,032.98
  5. Step 5: Solve for x
    x = 979,964,032.98/34,643.90
  6. Step 6: Final answer
    x = 28,286.77

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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.