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Finding the Fourth Proportional to 12,250.50, 16,915.21 and 9,413.40

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Solution

The fourth proportional to 12,250.50, 16,915.21 and 9,413.40 is: 12,997.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,250.50 : 16,915.21 = 9,413.40 : x
  2. Step 2: Convert to fraction form
    12,250.50/16,915.21 = 9,413.40/x
  3. Step 3: Cross multiply
    12,250.50x = 16,915.21 × 9,413.40
  4. Step 4: Simplify right side
    12,250.50x = 159,229,582.56
  5. Step 5: Solve for x
    x = 159,229,582.56/12,250.50
  6. Step 6: Final answer
    x = 12,997.81

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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.