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Finding the Fourth Proportional to 18,380.10, 27,558.31 and 7,856.99

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Solution

The fourth proportional to 18,380.10, 27,558.31 and 7,856.99 is: 11,780.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,380.10 : 27,558.31 = 7,856.99 : x
  2. Step 2: Convert to fraction form
    18,380.10/27,558.31 = 7,856.99/x
  3. Step 3: Cross multiply
    18,380.10x = 27,558.31 × 7,856.99
  4. Step 4: Simplify right side
    18,380.10x = 216,525,366.09
  5. Step 5: Solve for x
    x = 216,525,366.09/18,380.10
  6. Step 6: Final answer
    x = 11,780.42

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1.5x scale

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.