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Finding the Third Proportional to 7,310 and 15,991

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Solution

The third proportional to 7,310 and 15,991 is: 34,981.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,310 : 15,991 = 15,991 : x
  2. Step 2: Convert to fraction form
    7,310/15,991 = 15,991/x
  3. Step 3: Cross multiply
    7,310x = 15,991 × 15,991
  4. Step 4: Simplify right side
    7,310x = 255,712,081
  5. Step 5: Solve for x
    x = 255,712,081/7,310
  6. Step 6: Final answer
    x = 34,981.13

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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.