Home / 18,786.06-28,170-7,100.28

Finding the Fourth Proportional to 18,786.06, 28,170 and 7,100.28

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Solution

The fourth proportional to 18,786.06, 28,170 and 7,100.28 is: 10,646.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,786.06 : 28,170 = 7,100.28 : x
  2. Step 2: Convert to fraction form
    18,786.06/28,170 = 7,100.28/x
  3. Step 3: Cross multiply
    18,786.06x = 28,170 × 7,100.28
  4. Step 4: Simplify right side
    18,786.06x = 200,014,887.60
  5. Step 5: Solve for x
    x = 200,014,887.60/18,786.06
  6. Step 6: Final answer
    x = 10,646.98

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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.