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Finding the Third Proportional to 7,800 and 11,812.50

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Solution

The third proportional to 7,800 and 11,812.50 is: 17,889.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,800 : 11,812.50 = 11,812.50 : x
  2. Step 2: Convert to fraction form
    7,800/11,812.50 = 11,812.50/x
  3. Step 3: Cross multiply
    7,800x = 11,812.50 × 11,812.50
  4. Step 4: Simplify right side
    7,800x = 139,535,156.25
  5. Step 5: Solve for x
    x = 139,535,156.25/7,800
  6. Step 6: Final answer
    x = 17,889.12

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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.