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Finding the Fourth Proportional to 12,653.26, 18,979.90 and 3,419.26

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Solution

The fourth proportional to 12,653.26, 18,979.90 and 3,419.26 is: 5,128.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,653.26 : 18,979.90 = 3,419.26 : x
  2. Step 2: Convert to fraction form
    12,653.26/18,979.90 = 3,419.26/x
  3. Step 3: Cross multiply
    12,653.26x = 18,979.90 × 3,419.26
  4. Step 4: Simplify right side
    12,653.26x = 64,897,212.87
  5. Step 5: Solve for x
    x = 64,897,212.87/12,653.26
  6. Step 6: Final answer
    x = 5,128.89

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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.