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Finding the Fourth Proportional to 18,138.56, 27,214.83 and 7,053.05

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Solution

The fourth proportional to 18,138.56, 27,214.83 and 7,053.05 is: 10,582.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.56 : 27,214.83 = 7,053.05 : x
  2. Step 2: Convert to fraction form
    18,138.56/27,214.83 = 7,053.05/x
  3. Step 3: Cross multiply
    18,138.56x = 27,214.83 × 7,053.05
  4. Step 4: Simplify right side
    18,138.56x = 191,947,624.77
  5. Step 5: Solve for x
    x = 191,947,624.77/18,138.56
  6. Step 6: Final answer
    x = 10,582.30

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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.