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Finding the Fourth Proportional to 28,736.30, 43,106.88 and 7,679.54

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Solution

The fourth proportional to 28,736.30, 43,106.88 and 7,679.54 is: 11,519.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,736.30 : 43,106.88 = 7,679.54 : x
  2. Step 2: Convert to fraction form
    28,736.30/43,106.88 = 7,679.54/x
  3. Step 3: Cross multiply
    28,736.30x = 43,106.88 × 7,679.54
  4. Step 4: Simplify right side
    28,736.30x = 331,041,009.24
  5. Step 5: Solve for x
    x = 331,041,009.24/28,736.30
  6. Step 6: Final answer
    x = 11,519.96

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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.