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Finding the Third Proportional to 15,964 and 21,342

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Solution

The third proportional to 15,964 and 21,342 is: 28,531.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,964 : 21,342 = 21,342 : x
  2. Step 2: Convert to fraction form
    15,964/21,342 = 21,342/x
  3. Step 3: Cross multiply
    15,964x = 21,342 × 21,342
  4. Step 4: Simplify right side
    15,964x = 455,480,964
  5. Step 5: Solve for x
    x = 455,480,964/15,964
  6. Step 6: Final answer
    x = 28,531.76

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.