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Finding the Fourth Proportional to 18,803.56, 25,918.46 and 12,751.80

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Solution

The fourth proportional to 18,803.56, 25,918.46 and 12,751.80 is: 17,576.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.56 : 25,918.46 = 12,751.80 : x
  2. Step 2: Convert to fraction form
    18,803.56/25,918.46 = 12,751.80/x
  3. Step 3: Cross multiply
    18,803.56x = 25,918.46 × 12,751.80
  4. Step 4: Simplify right side
    18,803.56x = 330,507,018.23
  5. Step 5: Solve for x
    x = 330,507,018.23/18,803.56
  6. Step 6: Final answer
    x = 17,576.83

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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.