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Finding the Fourth Proportional to 19,123.44, 28,678.14 and 6,640.44

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Solution

The fourth proportional to 19,123.44, 28,678.14 and 6,640.44 is: 9,958.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,123.44 : 28,678.14 = 6,640.44 : x
  2. Step 2: Convert to fraction form
    19,123.44/28,678.14 = 6,640.44/x
  3. Step 3: Cross multiply
    19,123.44x = 28,678.14 × 6,640.44
  4. Step 4: Simplify right side
    19,123.44x = 190,435,467.98
  5. Step 5: Solve for x
    x = 190,435,467.98/19,123.44
  6. Step 6: Final answer
    x = 9,958.22

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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.