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Finding the Third Proportional to 28,393 and 39,709

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Solution

The third proportional to 28,393 and 39,709 is: 55,534.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,393 : 39,709 = 39,709 : x
  2. Step 2: Convert to fraction form
    28,393/39,709 = 39,709/x
  3. Step 3: Cross multiply
    28,393x = 39,709 × 39,709
  4. Step 4: Simplify right side
    28,393x = 1,576,804,681
  5. Step 5: Solve for x
    x = 1,576,804,681/28,393
  6. Step 6: Final answer
    x = 55,534.98

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.