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Finding the Fourth Proportional to 18,723.94, 28,085.34 and 7,627.87

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Solution

The fourth proportional to 18,723.94, 28,085.34 and 7,627.87 is: 11,441.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723.94 : 28,085.34 = 7,627.87 : x
  2. Step 2: Convert to fraction form
    18,723.94/28,085.34 = 7,627.87/x
  3. Step 3: Cross multiply
    18,723.94x = 28,085.34 × 7,627.87
  4. Step 4: Simplify right side
    18,723.94x = 214,231,322.43
  5. Step 5: Solve for x
    x = 214,231,322.43/18,723.94
  6. Step 6: Final answer
    x = 11,441.57

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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.