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Finding the Fourth Proportional to 18,712.74, 28,047.86 and 6,229.83

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Solution

The fourth proportional to 18,712.74, 28,047.86 and 6,229.83 is: 9,337.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.74 : 28,047.86 = 6,229.83 : x
  2. Step 2: Convert to fraction form
    18,712.74/28,047.86 = 6,229.83/x
  3. Step 3: Cross multiply
    18,712.74x = 28,047.86 × 6,229.83
  4. Step 4: Simplify right side
    18,712.74x = 174,733,368.51
  5. Step 5: Solve for x
    x = 174,733,368.51/18,712.74
  6. Step 6: Final answer
    x = 9,337.67

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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.