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Finding the Fourth Proportional to 18,406.80, 27,610.44 and 5,259.60

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Solution

The fourth proportional to 18,406.80, 27,610.44 and 5,259.60 is: 7,889.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,406.80 : 27,610.44 = 5,259.60 : x
  2. Step 2: Convert to fraction form
    18,406.80/27,610.44 = 5,259.60/x
  3. Step 3: Cross multiply
    18,406.80x = 27,610.44 × 5,259.60
  4. Step 4: Simplify right side
    18,406.80x = 145,219,870.22
  5. Step 5: Solve for x
    x = 145,219,870.22/18,406.80
  6. Step 6: Final answer
    x = 7,889.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.