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Finding the Fourth Proportional to 12,672.49, 19,007.51 and 3,905.05

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Solution

The fourth proportional to 12,672.49, 19,007.51 and 3,905.05 is: 5,857.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.49 : 19,007.51 = 3,905.05 : x
  2. Step 2: Convert to fraction form
    12,672.49/19,007.51 = 3,905.05/x
  3. Step 3: Cross multiply
    12,672.49x = 19,007.51 × 3,905.05
  4. Step 4: Simplify right side
    12,672.49x = 74,225,276.93
  5. Step 5: Solve for x
    x = 74,225,276.93/12,672.49
  6. Step 6: Final answer
    x = 5,857.20

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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.