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Finding the Third Proportional to 14,215.50 and 15,403.50

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Solution

The third proportional to 14,215.50 and 15,403.50 is: 16,690.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,215.50 : 15,403.50 = 15,403.50 : x
  2. Step 2: Convert to fraction form
    14,215.50/15,403.50 = 15,403.50/x
  3. Step 3: Cross multiply
    14,215.50x = 15,403.50 × 15,403.50
  4. Step 4: Simplify right side
    14,215.50x = 237,267,812.25
  5. Step 5: Solve for x
    x = 237,267,812.25/14,215.50
  6. Step 6: Final answer
    x = 16,690.78

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.