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Finding the Fourth Proportional to 18,804.93, 28,151.99 and 13,896.51

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Solution

The fourth proportional to 18,804.93, 28,151.99 and 13,896.51 is: 20,803.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.93 : 28,151.99 = 13,896.51 : x
  2. Step 2: Convert to fraction form
    18,804.93/28,151.99 = 13,896.51/x
  3. Step 3: Cross multiply
    18,804.93x = 28,151.99 × 13,896.51
  4. Step 4: Simplify right side
    18,804.93x = 391,214,410.55
  5. Step 5: Solve for x
    x = 391,214,410.55/18,804.93
  6. Step 6: Final answer
    x = 20,803.82

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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.