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Finding the Third Proportional to 15,342.75 and 21,127.50

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Solution

The third proportional to 15,342.75 and 21,127.50 is: 29,093.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,342.75 : 21,127.50 = 21,127.50 : x
  2. Step 2: Convert to fraction form
    15,342.75/21,127.50 = 21,127.50/x
  3. Step 3: Cross multiply
    15,342.75x = 21,127.50 × 21,127.50
  4. Step 4: Simplify right side
    15,342.75x = 446,371,256.25
  5. Step 5: Solve for x
    x = 446,371,256.25/15,342.75
  6. Step 6: Final answer
    x = 29,093.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.