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Finding the Fourth Proportional to 18,387.60, 27,581.40 and 11,826.60

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Solution

The fourth proportional to 18,387.60, 27,581.40 and 11,826.60 is: 17,739.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,387.60 : 27,581.40 = 11,826.60 : x
  2. Step 2: Convert to fraction form
    18,387.60/27,581.40 = 11,826.60/x
  3. Step 3: Cross multiply
    18,387.60x = 27,581.40 × 11,826.60
  4. Step 4: Simplify right side
    18,387.60x = 326,194,185.24
  5. Step 5: Solve for x
    x = 326,194,185.24/18,387.60
  6. Step 6: Final answer
    x = 17,739.90

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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.