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Finding the Third Proportional to 15,240 and 21,348

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Solution

The third proportional to 15,240 and 21,348 is: 29,904.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,240 : 21,348 = 21,348 : x
  2. Step 2: Convert to fraction form
    15,240/21,348 = 21,348/x
  3. Step 3: Cross multiply
    15,240x = 21,348 × 21,348
  4. Step 4: Simplify right side
    15,240x = 455,737,104
  5. Step 5: Solve for x
    x = 455,737,104/15,240
  6. Step 6: Final answer
    x = 29,904.01

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.