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Finding the Fourth Proportional to 18,977, 28,409.43 and 14,013.68

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Solution

The fourth proportional to 18,977, 28,409.43 and 14,013.68 is: 20,979.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,977 : 28,409.43 = 14,013.68 : x
  2. Step 2: Convert to fraction form
    18,977/28,409.43 = 14,013.68/x
  3. Step 3: Cross multiply
    18,977x = 28,409.43 × 14,013.68
  4. Step 4: Simplify right side
    18,977x = 398,120,661.00
  5. Step 5: Solve for x
    x = 398,120,661.00/18,977
  6. Step 6: Final answer
    x = 20,979.11

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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.