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Finding the Third Proportional to 28,080 and 40,128

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Solution

The third proportional to 28,080 and 40,128 is: 57,345.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080 : 40,128 = 40,128 : x
  2. Step 2: Convert to fraction form
    28,080/40,128 = 40,128/x
  3. Step 3: Cross multiply
    28,080x = 40,128 × 40,128
  4. Step 4: Simplify right side
    28,080x = 1,610,256,384
  5. Step 5: Solve for x
    x = 1,610,256,384/28,080
  6. Step 6: Final answer
    x = 57,345.31

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.