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Finding the Third Proportional to 15,750 and 21,015

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Solution

The third proportional to 15,750 and 21,015 is: 28,040.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,750 : 21,015 = 21,015 : x
  2. Step 2: Convert to fraction form
    15,750/21,015 = 21,015/x
  3. Step 3: Cross multiply
    15,750x = 21,015 × 21,015
  4. Step 4: Simplify right side
    15,750x = 441,630,225
  5. Step 5: Solve for x
    x = 441,630,225/15,750
  6. Step 6: Final answer
    x = 28,040.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.