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Finding the Fourth Proportional to 18,740.60, 28,110.90 and 4,889.60

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Solution

The fourth proportional to 18,740.60, 28,110.90 and 4,889.60 is: 7,334.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,740.60 : 28,110.90 = 4,889.60 : x
  2. Step 2: Convert to fraction form
    18,740.60/28,110.90 = 4,889.60/x
  3. Step 3: Cross multiply
    18,740.60x = 28,110.90 × 4,889.60
  4. Step 4: Simplify right side
    18,740.60x = 137,451,197.96
  5. Step 5: Solve for x
    x = 137,451,197.96/18,740.60
  6. Step 6: Final answer
    x = 7,334.41

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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.