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Finding the Fourth Proportional to 19,272.90, 28,912.05 and 6,123.90

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Solution

The fourth proportional to 19,272.90, 28,912.05 and 6,123.90 is: 9,186.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,272.90 : 28,912.05 = 6,123.90 : x
  2. Step 2: Convert to fraction form
    19,272.90/28,912.05 = 6,123.90/x
  3. Step 3: Cross multiply
    19,272.90x = 28,912.05 × 6,123.90
  4. Step 4: Simplify right side
    19,272.90x = 177,054,503.00
  5. Step 5: Solve for x
    x = 177,054,503.00/19,272.90
  6. Step 6: Final answer
    x = 9,186.71

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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.