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Finding the Fourth Proportional to 18,499.60, 27,749.40 and 6,811.30

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Solution

The fourth proportional to 18,499.60, 27,749.40 and 6,811.30 is: 10,216.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,499.60 : 27,749.40 = 6,811.30 : x
  2. Step 2: Convert to fraction form
    18,499.60/27,749.40 = 6,811.30/x
  3. Step 3: Cross multiply
    18,499.60x = 27,749.40 × 6,811.30
  4. Step 4: Simplify right side
    18,499.60x = 189,009,488.22
  5. Step 5: Solve for x
    x = 189,009,488.22/18,499.60
  6. Step 6: Final answer
    x = 10,216.95

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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.