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Finding the Fourth Proportional to 12,636.81, 17,438.09 and 7,924.23

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Solution

The fourth proportional to 12,636.81, 17,438.09 and 7,924.23 is: 10,934.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,636.81 : 17,438.09 = 7,924.23 : x
  2. Step 2: Convert to fraction form
    12,636.81/17,438.09 = 7,924.23/x
  3. Step 3: Cross multiply
    12,636.81x = 17,438.09 × 7,924.23
  4. Step 4: Simplify right side
    12,636.81x = 138,183,396.30
  5. Step 5: Solve for x
    x = 138,183,396.30/12,636.81
  6. Step 6: Final answer
    x = 10,934.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.