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Finding the Fourth Proportional to 18,990.44, 28,466.22 and 7,903.56

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Solution

The fourth proportional to 18,990.44, 28,466.22 and 7,903.56 is: 11,847.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.44 : 28,466.22 = 7,903.56 : x
  2. Step 2: Convert to fraction form
    18,990.44/28,466.22 = 7,903.56/x
  3. Step 3: Cross multiply
    18,990.44x = 28,466.22 × 7,903.56
  4. Step 4: Simplify right side
    18,990.44x = 224,984,477.74
  5. Step 5: Solve for x
    x = 224,984,477.74/18,990.44
  6. Step 6: Final answer
    x = 11,847.25

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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.