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Finding the Fourth Proportional to 19,119.96, 28,679.94 and 7,435.91

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Solution

The fourth proportional to 19,119.96, 28,679.94 and 7,435.91 is: 11,153.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,119.96 : 28,679.94 = 7,435.91 : x
  2. Step 2: Convert to fraction form
    19,119.96/28,679.94 = 7,435.91/x
  3. Step 3: Cross multiply
    19,119.96x = 28,679.94 × 7,435.91
  4. Step 4: Simplify right side
    19,119.96x = 213,261,452.65
  5. Step 5: Solve for x
    x = 213,261,452.65/19,119.96
  6. Step 6: Final answer
    x = 11,153.87

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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.