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Finding the Fourth Proportional to 14,405, 21,609.66 and 5,173.16

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Solution

The fourth proportional to 14,405, 21,609.66 and 5,173.16 is: 7,760.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,405 : 21,609.66 = 5,173.16 : x
  2. Step 2: Convert to fraction form
    14,405/21,609.66 = 5,173.16/x
  3. Step 3: Cross multiply
    14,405x = 21,609.66 × 5,173.16
  4. Step 4: Simplify right side
    14,405x = 111,790,228.73
  5. Step 5: Solve for x
    x = 111,790,228.73/14,405
  6. Step 6: Final answer
    x = 7,760.52

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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.