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Finding the Fourth Proportional to 12,672.10, 19,011.21 and 3,907.18

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Solution

The fourth proportional to 12,672.10, 19,011.21 and 3,907.18 is: 5,861.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.10 : 19,011.21 = 3,907.18 : x
  2. Step 2: Convert to fraction form
    12,672.10/19,011.21 = 3,907.18/x
  3. Step 3: Cross multiply
    12,672.10x = 19,011.21 × 3,907.18
  4. Step 4: Simplify right side
    12,672.10x = 74,280,219.49
  5. Step 5: Solve for x
    x = 74,280,219.49/12,672.10
  6. Step 6: Final answer
    x = 5,861.71

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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.