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Finding the Fourth Proportional to 18,714.48, 28,087.88 and 7,627.28

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Solution

The fourth proportional to 18,714.48, 28,087.88 and 7,627.28 is: 11,447.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,714.48 : 28,087.88 = 7,627.28 : x
  2. Step 2: Convert to fraction form
    18,714.48/28,087.88 = 7,627.28/x
  3. Step 3: Cross multiply
    18,714.48x = 28,087.88 × 7,627.28
  4. Step 4: Simplify right side
    18,714.48x = 214,234,125.37
  5. Step 5: Solve for x
    x = 214,234,125.37/18,714.48
  6. Step 6: Final answer
    x = 11,447.51

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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.