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Finding the Third Proportional to 14,316 and 21,390

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Solution

The third proportional to 14,316 and 21,390 is: 31,959.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,316 : 21,390 = 21,390 : x
  2. Step 2: Convert to fraction form
    14,316/21,390 = 21,390/x
  3. Step 3: Cross multiply
    14,316x = 21,390 × 21,390
  4. Step 4: Simplify right side
    14,316x = 457,532,100
  5. Step 5: Solve for x
    x = 457,532,100/14,316
  6. Step 6: Final answer
    x = 31,959.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.