Home / 18,687.63-28,037.49-11,190

Finding the Fourth Proportional to 18,687.63, 28,037.49 and 11,190

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Solution

The fourth proportional to 18,687.63, 28,037.49 and 11,190 is: 16,788.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.63 : 28,037.49 = 11,190 : x
  2. Step 2: Convert to fraction form
    18,687.63/28,037.49 = 11,190/x
  3. Step 3: Cross multiply
    18,687.63x = 28,037.49 × 11,190
  4. Step 4: Simplify right side
    18,687.63x = 313,739,513.10
  5. Step 5: Solve for x
    x = 313,739,513.10/18,687.63
  6. Step 6: Final answer
    x = 16,788.62

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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.