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Finding the Fourth Proportional to 34,907.50, 48,172.08 and 18,991.90

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Solution

The fourth proportional to 34,907.50, 48,172.08 and 18,991.90 is: 26,208.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,907.50 : 48,172.08 = 18,991.90 : x
  2. Step 2: Convert to fraction form
    34,907.50/48,172.08 = 18,991.90/x
  3. Step 3: Cross multiply
    34,907.50x = 48,172.08 × 18,991.90
  4. Step 4: Simplify right side
    34,907.50x = 914,879,326.15
  5. Step 5: Solve for x
    x = 914,879,326.15/34,907.50
  6. Step 6: Final answer
    x = 26,208.68

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Why These Related Problems?

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