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Finding the Fourth Proportional to 28,495.36, 42,751.64 and 8,505.49

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Solution

The fourth proportional to 28,495.36, 42,751.64 and 8,505.49 is: 12,760.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,495.36 : 42,751.64 = 8,505.49 : x
  2. Step 2: Convert to fraction form
    28,495.36/42,751.64 = 8,505.49/x
  3. Step 3: Cross multiply
    28,495.36x = 42,751.64 × 8,505.49
  4. Step 4: Simplify right side
    28,495.36x = 363,623,761.60
  5. Step 5: Solve for x
    x = 363,623,761.60/28,495.36
  6. Step 6: Final answer
    x = 12,760.81

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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.