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Finding the Fourth Proportional to 18,690.70, 28,040.10 and 6,208.60

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Solution

The fourth proportional to 18,690.70, 28,040.10 and 6,208.60 is: 9,314.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.70 : 28,040.10 = 6,208.60 : x
  2. Step 2: Convert to fraction form
    18,690.70/28,040.10 = 6,208.60/x
  3. Step 3: Cross multiply
    18,690.70x = 28,040.10 × 6,208.60
  4. Step 4: Simplify right side
    18,690.70x = 174,089,764.86
  5. Step 5: Solve for x
    x = 174,089,764.86/18,690.70
  6. Step 6: Final answer
    x = 9,314.25

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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.