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Finding the Third Proportional to 7,139 and 15,664

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Solution

The third proportional to 7,139 and 15,664 is: 34,369.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139 : 15,664 = 15,664 : x
  2. Step 2: Convert to fraction form
    7,139/15,664 = 15,664/x
  3. Step 3: Cross multiply
    7,139x = 15,664 × 15,664
  4. Step 4: Simplify right side
    7,139x = 245,360,896
  5. Step 5: Solve for x
    x = 245,360,896/7,139
  6. Step 6: Final answer
    x = 34,369.08

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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.