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Finding the Fourth Proportional to 18,021.81, 27,012.65 and 7,485.96

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Solution

The fourth proportional to 18,021.81, 27,012.65 and 7,485.96 is: 11,220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,021.81 : 27,012.65 = 7,485.96 : x
  2. Step 2: Convert to fraction form
    18,021.81/27,012.65 = 7,485.96/x
  3. Step 3: Cross multiply
    18,021.81x = 27,012.65 × 7,485.96
  4. Step 4: Simplify right side
    18,021.81x = 202,215,579.96
  5. Step 5: Solve for x
    x = 202,215,579.96/18,021.81
  6. Step 6: Final answer
    x = 11,220.60

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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.