Home / 19,120.76-28,668.90-7,424.36

Finding the Fourth Proportional to 19,120.76, 28,668.90 and 7,424.36

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Solution

The fourth proportional to 19,120.76, 28,668.90 and 7,424.36 is: 11,131.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,120.76 : 28,668.90 = 7,424.36 : x
  2. Step 2: Convert to fraction form
    19,120.76/28,668.90 = 7,424.36/x
  3. Step 3: Cross multiply
    19,120.76x = 28,668.90 × 7,424.36
  4. Step 4: Simplify right side
    19,120.76x = 212,848,234.40
  5. Step 5: Solve for x
    x = 212,848,234.40/19,120.76
  6. Step 6: Final answer
    x = 11,131.79

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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.