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Finding the Third Proportional to 4,392 and 9,440

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Solution

The third proportional to 4,392 and 9,440 is: 20,289.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,392 : 9,440 = 9,440 : x
  2. Step 2: Convert to fraction form
    4,392/9,440 = 9,440/x
  3. Step 3: Cross multiply
    4,392x = 9,440 × 9,440
  4. Step 4: Simplify right side
    4,392x = 89,113,600
  5. Step 5: Solve for x
    x = 89,113,600/4,392
  6. Step 6: Final answer
    x = 20,289.98

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.