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Finding the Third Proportional to 13,020 and 19,700

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Solution

The third proportional to 13,020 and 19,700 is: 29,807.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,020 : 19,700 = 19,700 : x
  2. Step 2: Convert to fraction form
    13,020/19,700 = 19,700/x
  3. Step 3: Cross multiply
    13,020x = 19,700 × 19,700
  4. Step 4: Simplify right side
    13,020x = 388,090,000
  5. Step 5: Solve for x
    x = 388,090,000/13,020
  6. Step 6: Final answer
    x = 29,807.22

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.