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Finding the Fourth Proportional to 12,456, 17,189.53 and 6,790.73

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Solution

The fourth proportional to 12,456, 17,189.53 and 6,790.73 is: 9,371.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,456 : 17,189.53 = 6,790.73 : x
  2. Step 2: Convert to fraction form
    12,456/17,189.53 = 6,790.73/x
  3. Step 3: Cross multiply
    12,456x = 17,189.53 × 6,790.73
  4. Step 4: Simplify right side
    12,456x = 116,729,457.06
  5. Step 5: Solve for x
    x = 116,729,457.06/12,456
  6. Step 6: Final answer
    x = 9,371.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.