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Finding the Third Proportional to 18,158 and 39,709

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Solution

The third proportional to 18,158 and 39,709 is: 86,838.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,158 : 39,709 = 39,709 : x
  2. Step 2: Convert to fraction form
    18,158/39,709 = 39,709/x
  3. Step 3: Cross multiply
    18,158x = 39,709 × 39,709
  4. Step 4: Simplify right side
    18,158x = 1,576,804,681
  5. Step 5: Solve for x
    x = 1,576,804,681/18,158
  6. Step 6: Final answer
    x = 86,838.02

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.