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Finding the Third Proportional to 21,942 and 47,430

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Solution

The third proportional to 21,942 and 47,430 is: 102,525.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,942 : 47,430 = 47,430 : x
  2. Step 2: Convert to fraction form
    21,942/47,430 = 47,430/x
  3. Step 3: Cross multiply
    21,942x = 47,430 × 47,430
  4. Step 4: Simplify right side
    21,942x = 2,249,604,900
  5. Step 5: Solve for x
    x = 2,249,604,900/21,942
  6. Step 6: Final answer
    x = 102,525.06

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.