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Finding the Fourth Proportional to 19,070.70, 28,605.78 and 7,375.65

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Solution

The fourth proportional to 19,070.70, 28,605.78 and 7,375.65 is: 11,063.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,070.70 : 28,605.78 = 7,375.65 : x
  2. Step 2: Convert to fraction form
    19,070.70/28,605.78 = 7,375.65/x
  3. Step 3: Cross multiply
    19,070.70x = 28,605.78 × 7,375.65
  4. Step 4: Simplify right side
    19,070.70x = 210,986,221.26
  5. Step 5: Solve for x
    x = 210,986,221.26/19,070.70
  6. Step 6: Final answer
    x = 11,063.37

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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.