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Finding the Third Proportional to 18,656.50 and 40,320.50

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Solution

The third proportional to 18,656.50 and 40,320.50 is: 87,140.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,656.50 : 40,320.50 = 40,320.50 : x
  2. Step 2: Convert to fraction form
    18,656.50/40,320.50 = 40,320.50/x
  3. Step 3: Cross multiply
    18,656.50x = 40,320.50 × 40,320.50
  4. Step 4: Simplify right side
    18,656.50x = 1,625,742,720.25
  5. Step 5: Solve for x
    x = 1,625,742,720.25/18,656.50
  6. Step 6: Final answer
    x = 87,140.82

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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.