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Finding the Fourth Proportional to 12,789.89, 17,650.08 and 7,413.36

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Solution

The fourth proportional to 12,789.89, 17,650.08 and 7,413.36 is: 10,230.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,789.89 : 17,650.08 = 7,413.36 : x
  2. Step 2: Convert to fraction form
    12,789.89/17,650.08 = 7,413.36/x
  3. Step 3: Cross multiply
    12,789.89x = 17,650.08 × 7,413.36
  4. Step 4: Simplify right side
    12,789.89x = 130,846,397.07
  5. Step 5: Solve for x
    x = 130,846,397.07/12,789.89
  6. Step 6: Final answer
    x = 10,230.46

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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.