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Finding the Fourth Proportional to 18,673.85, 28,015.98 and 8,144.81

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Solution

The fourth proportional to 18,673.85, 28,015.98 and 8,144.81 is: 12,219.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,673.85 : 28,015.98 = 8,144.81 : x
  2. Step 2: Convert to fraction form
    18,673.85/28,015.98 = 8,144.81/x
  3. Step 3: Cross multiply
    18,673.85x = 28,015.98 × 8,144.81
  4. Step 4: Simplify right side
    18,673.85x = 228,184,834.06
  5. Step 5: Solve for x
    x = 228,184,834.06/18,673.85
  6. Step 6: Final answer
    x = 12,219.49

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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.