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Finding the Fourth Proportional to 18,816.06, 25,978.41 and 12,845.55

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Solution

The fourth proportional to 18,816.06, 25,978.41 and 12,845.55 is: 17,735.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.06 : 25,978.41 = 12,845.55 : x
  2. Step 2: Convert to fraction form
    18,816.06/25,978.41 = 12,845.55/x
  3. Step 3: Cross multiply
    18,816.06x = 25,978.41 × 12,845.55
  4. Step 4: Simplify right side
    18,816.06x = 333,706,964.58
  5. Step 5: Solve for x
    x = 333,706,964.58/18,816.06
  6. Step 6: Final answer
    x = 17,735.22

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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.