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Finding the Third Proportional to 19,392 and 28,720

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Solution

The third proportional to 19,392 and 28,720 is: 42,534.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,392 : 28,720 = 28,720 : x
  2. Step 2: Convert to fraction form
    19,392/28,720 = 28,720/x
  3. Step 3: Cross multiply
    19,392x = 28,720 × 28,720
  4. Step 4: Simplify right side
    19,392x = 824,838,400
  5. Step 5: Solve for x
    x = 824,838,400/19,392
  6. Step 6: Final answer
    x = 42,534.98

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.