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Finding the Fourth Proportional to 15,063.66, 20,787.60 and 8,257.64

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Solution

The fourth proportional to 15,063.66, 20,787.60 and 8,257.64 is: 11,395.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,063.66 : 20,787.60 = 8,257.64 : x
  2. Step 2: Convert to fraction form
    15,063.66/20,787.60 = 8,257.64/x
  3. Step 3: Cross multiply
    15,063.66x = 20,787.60 × 8,257.64
  4. Step 4: Simplify right side
    15,063.66x = 171,656,413.33
  5. Step 5: Solve for x
    x = 171,656,413.33/15,063.66
  6. Step 6: Final answer
    x = 11,395.40

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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.