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Finding the Fourth Proportional to 12,679.80, 19,025.30 and 6,829.56

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Solution

The fourth proportional to 12,679.80, 19,025.30 and 6,829.56 is: 10,247.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.80 : 19,025.30 = 6,829.56 : x
  2. Step 2: Convert to fraction form
    12,679.80/19,025.30 = 6,829.56/x
  3. Step 3: Cross multiply
    12,679.80x = 19,025.30 × 6,829.56
  4. Step 4: Simplify right side
    12,679.80x = 129,934,427.87
  5. Step 5: Solve for x
    x = 129,934,427.87/12,679.80
  6. Step 6: Final answer
    x = 10,247.36

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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.