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Finding the Fourth Proportional to 12,704.10, 19,056.15 and 12,072.30

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Solution

The fourth proportional to 12,704.10, 19,056.15 and 12,072.30 is: 18,108.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,704.10 : 19,056.15 = 12,072.30 : x
  2. Step 2: Convert to fraction form
    12,704.10/19,056.15 = 12,072.30/x
  3. Step 3: Cross multiply
    12,704.10x = 19,056.15 × 12,072.30
  4. Step 4: Simplify right side
    12,704.10x = 230,051,559.65
  5. Step 5: Solve for x
    x = 230,051,559.65/12,704.10
  6. Step 6: Final answer
    x = 18,108.45

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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.