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Finding the Third Proportional to 6,921 and 14,439

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Solution

The third proportional to 6,921 and 14,439 is: 30,123.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921 : 14,439 = 14,439 : x
  2. Step 2: Convert to fraction form
    6,921/14,439 = 14,439/x
  3. Step 3: Cross multiply
    6,921x = 14,439 × 14,439
  4. Step 4: Simplify right side
    6,921x = 208,484,721
  5. Step 5: Solve for x
    x = 208,484,721/6,921
  6. Step 6: Final answer
    x = 30,123.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.