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Finding the Third Proportional to 21,808 and 47,070

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Solution

The third proportional to 21,808 and 47,070 is: 101,595.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,808 : 47,070 = 47,070 : x
  2. Step 2: Convert to fraction form
    21,808/47,070 = 47,070/x
  3. Step 3: Cross multiply
    21,808x = 47,070 × 47,070
  4. Step 4: Simplify right side
    21,808x = 2,215,584,900
  5. Step 5: Solve for x
    x = 2,215,584,900/21,808
  6. Step 6: Final answer
    x = 101,595.05

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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.