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Finding the Fourth Proportional to 18,704.40, 28,045.80 and 7,018.80

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Solution

The fourth proportional to 18,704.40, 28,045.80 and 7,018.80 is: 10,524.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.40 : 28,045.80 = 7,018.80 : x
  2. Step 2: Convert to fraction form
    18,704.40/28,045.80 = 7,018.80/x
  3. Step 3: Cross multiply
    18,704.40x = 28,045.80 × 7,018.80
  4. Step 4: Simplify right side
    18,704.40x = 196,847,861.04
  5. Step 5: Solve for x
    x = 196,847,861.04/18,704.40
  6. Step 6: Final answer
    x = 10,524.15

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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.