Home / 18,015.40-27,008.70-7,618.60

Finding the Fourth Proportional to 18,015.40, 27,008.70 and 7,618.60

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Solution

The fourth proportional to 18,015.40, 27,008.70 and 7,618.60 is: 11,421.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,015.40 : 27,008.70 = 7,618.60 : x
  2. Step 2: Convert to fraction form
    18,015.40/27,008.70 = 7,618.60/x
  3. Step 3: Cross multiply
    18,015.40x = 27,008.70 × 7,618.60
  4. Step 4: Simplify right side
    18,015.40x = 205,768,481.82
  5. Step 5: Solve for x
    x = 205,768,481.82/18,015.40
  6. Step 6: Final answer
    x = 11,421.81

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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.