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Finding the Third Proportional to 4,700 and 9,715

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Solution

The third proportional to 4,700 and 9,715 is: 20,081.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,700 : 9,715 = 9,715 : x
  2. Step 2: Convert to fraction form
    4,700/9,715 = 9,715/x
  3. Step 3: Cross multiply
    4,700x = 9,715 × 9,715
  4. Step 4: Simplify right side
    4,700x = 94,381,225
  5. Step 5: Solve for x
    x = 94,381,225/4,700
  6. Step 6: Final answer
    x = 20,081.11

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.