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Finding the Third Proportional to 15,903 and 20,918.50

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Solution

The third proportional to 15,903 and 20,918.50 is: 27,515.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,903 : 20,918.50 = 20,918.50 : x
  2. Step 2: Convert to fraction form
    15,903/20,918.50 = 20,918.50/x
  3. Step 3: Cross multiply
    15,903x = 20,918.50 × 20,918.50
  4. Step 4: Simplify right side
    15,903x = 437,583,642.25
  5. Step 5: Solve for x
    x = 437,583,642.25/15,903
  6. Step 6: Final answer
    x = 27,515.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.