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Finding the Third Proportional to 7,903.50 and 12,321

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Solution

The third proportional to 7,903.50 and 12,321 is: 19,207.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,903.50 : 12,321 = 12,321 : x
  2. Step 2: Convert to fraction form
    7,903.50/12,321 = 12,321/x
  3. Step 3: Cross multiply
    7,903.50x = 12,321 × 12,321
  4. Step 4: Simplify right side
    7,903.50x = 151,807,041
  5. Step 5: Solve for x
    x = 151,807,041/7,903.50
  6. Step 6: Final answer
    x = 19,207.57

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.