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Finding the Third Proportional to 7,128 and 14,985

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Solution

The third proportional to 7,128 and 14,985 is: 31,502.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128 : 14,985 = 14,985 : x
  2. Step 2: Convert to fraction form
    7,128/14,985 = 14,985/x
  3. Step 3: Cross multiply
    7,128x = 14,985 × 14,985
  4. Step 4: Simplify right side
    7,128x = 224,550,225
  5. Step 5: Solve for x
    x = 224,550,225/7,128
  6. Step 6: Final answer
    x = 31,502.56

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.