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Finding the Fourth Proportional to 18,357.05, 27,539.12 and 7,826.90

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Solution

The fourth proportional to 18,357.05, 27,539.12 and 7,826.90 is: 11,741.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,357.05 : 27,539.12 = 7,826.90 : x
  2. Step 2: Convert to fraction form
    18,357.05/27,539.12 = 7,826.90/x
  3. Step 3: Cross multiply
    18,357.05x = 27,539.12 × 7,826.90
  4. Step 4: Simplify right side
    18,357.05x = 215,545,820.20
  5. Step 5: Solve for x
    x = 215,545,820.20/18,357.05
  6. Step 6: Final answer
    x = 11,741.85

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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.