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Finding the Fourth Proportional to 12,795, 17,656.84 and 7,129.73

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Solution

The fourth proportional to 12,795, 17,656.84 and 7,129.73 is: 9,838.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,795 : 17,656.84 = 7,129.73 : x
  2. Step 2: Convert to fraction form
    12,795/17,656.84 = 7,129.73/x
  3. Step 3: Cross multiply
    12,795x = 17,656.84 × 7,129.73
  4. Step 4: Simplify right side
    12,795x = 125,888,501.85
  5. Step 5: Solve for x
    x = 125,888,501.85/12,795
  6. Step 6: Final answer
    x = 9,838.88

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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.