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Finding the Third Proportional to 4,172 and 9,070

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Solution

The third proportional to 4,172 and 9,070 is: 19,718.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,172 : 9,070 = 9,070 : x
  2. Step 2: Convert to fraction form
    4,172/9,070 = 9,070/x
  3. Step 3: Cross multiply
    4,172x = 9,070 × 9,070
  4. Step 4: Simplify right side
    4,172x = 82,264,900
  5. Step 5: Solve for x
    x = 82,264,900/4,172
  6. Step 6: Final answer
    x = 19,718.34

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.