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Finding the Fourth Proportional to 18,499.80, 27,749.70 and 6,810.60

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Solution

The fourth proportional to 18,499.80, 27,749.70 and 6,810.60 is: 10,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,499.80 : 27,749.70 = 6,810.60 : x
  2. Step 2: Convert to fraction form
    18,499.80/27,749.70 = 6,810.60/x
  3. Step 3: Cross multiply
    18,499.80x = 27,749.70 × 6,810.60
  4. Step 4: Simplify right side
    18,499.80x = 188,992,106.82
  5. Step 5: Solve for x
    x = 188,992,106.82/18,499.80
  6. Step 6: Final answer
    x = 10,215.90

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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.