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Finding the Fourth Proportional to 12,794.75, 17,656.49 and 7,129.48

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Solution

The fourth proportional to 12,794.75, 17,656.49 and 7,129.48 is: 9,838.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,794.75 : 17,656.49 = 7,129.48 : x
  2. Step 2: Convert to fraction form
    12,794.75/17,656.49 = 7,129.48/x
  3. Step 3: Cross multiply
    12,794.75x = 17,656.49 × 7,129.48
  4. Step 4: Simplify right side
    12,794.75x = 125,881,566.01
  5. Step 5: Solve for x
    x = 125,881,566.01/12,794.75
  6. Step 6: Final answer
    x = 9,838.53

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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.