Home / 18,748.70-28,129.21-7,664.73

Finding the Fourth Proportional to 18,748.70, 28,129.21 and 7,664.73

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Solution

The fourth proportional to 18,748.70, 28,129.21 and 7,664.73 is: 11,499.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,748.70 : 28,129.21 = 7,664.73 : x
  2. Step 2: Convert to fraction form
    18,748.70/28,129.21 = 7,664.73/x
  3. Step 3: Cross multiply
    18,748.70x = 28,129.21 × 7,664.73
  4. Step 4: Simplify right side
    18,748.70x = 215,602,675.12
  5. Step 5: Solve for x
    x = 215,602,675.12/18,748.70
  6. Step 6: Final answer
    x = 11,499.61

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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.