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Finding the Third Proportional to 15,856 and 19,240

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Solution

The third proportional to 15,856 and 19,240 is: 23,346.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,856 : 19,240 = 19,240 : x
  2. Step 2: Convert to fraction form
    15,856/19,240 = 19,240/x
  3. Step 3: Cross multiply
    15,856x = 19,240 × 19,240
  4. Step 4: Simplify right side
    15,856x = 370,177,600
  5. Step 5: Solve for x
    x = 370,177,600/15,856
  6. Step 6: Final answer
    x = 23,346.22

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.