Home / 18,748.04-28,129.82-8,212.61

Finding the Fourth Proportional to 18,748.04, 28,129.82 and 8,212.61

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Solution

The fourth proportional to 18,748.04, 28,129.82 and 8,212.61 is: 12,322.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,748.04 : 28,129.82 = 8,212.61 : x
  2. Step 2: Convert to fraction form
    18,748.04/28,129.82 = 8,212.61/x
  3. Step 3: Cross multiply
    18,748.04x = 28,129.82 × 8,212.61
  4. Step 4: Simplify right side
    18,748.04x = 231,019,270.29
  5. Step 5: Solve for x
    x = 231,019,270.29/18,748.04
  6. Step 6: Final answer
    x = 12,322.32

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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.