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Finding the Third Proportional to 7,773 and 9,979.50

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Solution

The third proportional to 7,773 and 9,979.50 is: 12,812.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,773 : 9,979.50 = 9,979.50 : x
  2. Step 2: Convert to fraction form
    7,773/9,979.50 = 9,979.50/x
  3. Step 3: Cross multiply
    7,773x = 9,979.50 × 9,979.50
  4. Step 4: Simplify right side
    7,773x = 99,590,420.25
  5. Step 5: Solve for x
    x = 99,590,420.25/7,773
  6. Step 6: Final answer
    x = 12,812.35

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.