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Finding the Third Proportional to 18,840 and 40,784

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Solution

The third proportional to 18,840 and 40,784 is: 88,287.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,840 : 40,784 = 40,784 : x
  2. Step 2: Convert to fraction form
    18,840/40,784 = 40,784/x
  3. Step 3: Cross multiply
    18,840x = 40,784 × 40,784
  4. Step 4: Simplify right side
    18,840x = 1,663,334,656
  5. Step 5: Solve for x
    x = 1,663,334,656/18,840
  6. Step 6: Final answer
    x = 88,287.40

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.