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Finding the Third Proportional to 8,391 and 18,359.50

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Solution

The third proportional to 8,391 and 18,359.50 is: 40,170.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391 : 18,359.50 = 18,359.50 : x
  2. Step 2: Convert to fraction form
    8,391/18,359.50 = 18,359.50/x
  3. Step 3: Cross multiply
    8,391x = 18,359.50 × 18,359.50
  4. Step 4: Simplify right side
    8,391x = 337,071,240.25
  5. Step 5: Solve for x
    x = 337,071,240.25/8,391
  6. Step 6: Final answer
    x = 40,170.57

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1.5x scale

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.