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Finding the Fourth Proportional to 8,782.73, 12,120.05 and 4,803.79

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Solution

The fourth proportional to 8,782.73, 12,120.05 and 4,803.79 is: 6,629.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.73 : 12,120.05 = 4,803.79 : x
  2. Step 2: Convert to fraction form
    8,782.73/12,120.05 = 4,803.79/x
  3. Step 3: Cross multiply
    8,782.73x = 12,120.05 × 4,803.79
  4. Step 4: Simplify right side
    8,782.73x = 58,222,152.40
  5. Step 5: Solve for x
    x = 58,222,152.40/8,782.73
  6. Step 6: Final answer
    x = 6,629.16

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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.