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Finding the Fourth Proportional to 28,699.25, 43,052.09 and 7,640.11

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Solution

The fourth proportional to 28,699.25, 43,052.09 and 7,640.11 is: 11,461.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,699.25 : 43,052.09 = 7,640.11 : x
  2. Step 2: Convert to fraction form
    28,699.25/43,052.09 = 7,640.11/x
  3. Step 3: Cross multiply
    28,699.25x = 43,052.09 × 7,640.11
  4. Step 4: Simplify right side
    28,699.25x = 328,922,519.75
  5. Step 5: Solve for x
    x = 328,922,519.75/28,699.25
  6. Step 6: Final answer
    x = 11,461.02

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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.