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Finding the Fourth Proportional to 18,729.96, 28,094.84 and 7,636.61

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Solution

The fourth proportional to 18,729.96, 28,094.84 and 7,636.61 is: 11,454.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,729.96 : 28,094.84 = 7,636.61 : x
  2. Step 2: Convert to fraction form
    18,729.96/28,094.84 = 7,636.61/x
  3. Step 3: Cross multiply
    18,729.96x = 28,094.84 × 7,636.61
  4. Step 4: Simplify right side
    18,729.96x = 214,549,186.07
  5. Step 5: Solve for x
    x = 214,549,186.07/18,729.96
  6. Step 6: Final answer
    x = 11,454.87

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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.