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Finding the Fourth Proportional to 8,783.78, 12,121.51 and 4,804.84

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Solution

The fourth proportional to 8,783.78, 12,121.51 and 4,804.84 is: 6,630.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,783.78 : 12,121.51 = 4,804.84 : x
  2. Step 2: Convert to fraction form
    8,783.78/12,121.51 = 4,804.84/x
  3. Step 3: Cross multiply
    8,783.78x = 12,121.51 × 4,804.84
  4. Step 4: Simplify right side
    8,783.78x = 58,241,917.97
  5. Step 5: Solve for x
    x = 58,241,917.97/8,783.78
  6. Step 6: Final answer
    x = 6,630.62

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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.