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Finding the Fourth Proportional to 15,039.12, 20,755.14 and 8,751

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Solution

The fourth proportional to 15,039.12, 20,755.14 and 8,751 is: 12,077.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,039.12 : 20,755.14 = 8,751 : x
  2. Step 2: Convert to fraction form
    15,039.12/20,755.14 = 8,751/x
  3. Step 3: Cross multiply
    15,039.12x = 20,755.14 × 8,751
  4. Step 4: Simplify right side
    15,039.12x = 181,628,230.14
  5. Step 5: Solve for x
    x = 181,628,230.14/15,039.12
  6. Step 6: Final answer
    x = 12,077.05

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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.