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Finding the Fourth Proportional to 28,752.50, 43,128.75 and 7,976

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Solution

The fourth proportional to 28,752.50, 43,128.75 and 7,976 is: 11,964

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,752.50 : 43,128.75 = 7,976 : x
  2. Step 2: Convert to fraction form
    28,752.50/43,128.75 = 7,976/x
  3. Step 3: Cross multiply
    28,752.50x = 43,128.75 × 7,976
  4. Step 4: Simplify right side
    28,752.50x = 343,994,910
  5. Step 5: Solve for x
    x = 343,994,910/28,752.50
  6. Step 6: Final answer
    x = 11,964

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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.