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Finding the Third Proportional to 19,320 and 40,716

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Solution

The third proportional to 19,320 and 40,716 is: 85,807.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,320 : 40,716 = 40,716 : x
  2. Step 2: Convert to fraction form
    19,320/40,716 = 40,716/x
  3. Step 3: Cross multiply
    19,320x = 40,716 × 40,716
  4. Step 4: Simplify right side
    19,320x = 1,657,792,656
  5. Step 5: Solve for x
    x = 1,657,792,656/19,320
  6. Step 6: Final answer
    x = 85,807.07

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.