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Finding the Fourth Proportional to 18,993.51, 28,475.00 and 13,052.79

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Solution

The fourth proportional to 18,993.51, 28,475.00 and 13,052.79 is: 19,568.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,993.51 : 28,475.00 = 13,052.79 : x
  2. Step 2: Convert to fraction form
    18,993.51/28,475.00 = 13,052.79/x
  3. Step 3: Cross multiply
    18,993.51x = 28,475.00 × 13,052.79
  4. Step 4: Simplify right side
    18,993.51x = 371,678,129.99
  5. Step 5: Solve for x
    x = 371,678,129.99/18,993.51
  6. Step 6: Final answer
    x = 19,568.69

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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.