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Finding the Third Proportional to 15,352 and 20,931

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Solution

The third proportional to 15,352 and 20,931 is: 28,537.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,352 : 20,931 = 20,931 : x
  2. Step 2: Convert to fraction form
    15,352/20,931 = 20,931/x
  3. Step 3: Cross multiply
    15,352x = 20,931 × 20,931
  4. Step 4: Simplify right side
    15,352x = 438,106,761
  5. Step 5: Solve for x
    x = 438,106,761/15,352
  6. Step 6: Final answer
    x = 28,537.44

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.