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Finding the Fourth Proportional to 18,430.89, 27,611.64 and 10,912.20

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Solution

The fourth proportional to 18,430.89, 27,611.64 and 10,912.20 is: 16,347.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,430.89 : 27,611.64 = 10,912.20 : x
  2. Step 2: Convert to fraction form
    18,430.89/27,611.64 = 10,912.20/x
  3. Step 3: Cross multiply
    18,430.89x = 27,611.64 × 10,912.20
  4. Step 4: Simplify right side
    18,430.89x = 301,303,738.01
  5. Step 5: Solve for x
    x = 301,303,738.01/18,430.89
  6. Step 6: Final answer
    x = 16,347.76

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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.