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Finding the Third Proportional to 18,870,421 and 28,275,999.50

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Solution

The third proportional to 18,870,421 and 28,275,999.50 is: 42,369,597.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870,421 : 28,275,999.50 = 28,275,999.50 : x
  2. Step 2: Convert to fraction form
    18,870,421/28,275,999.50 = 28,275,999.50/x
  3. Step 3: Cross multiply
    18,870,421x = 28,275,999.50 × 28,275,999.50
  4. Step 4: Simplify right side
    18,870,421x = 799,532,147,724,000.25
  5. Step 5: Solve for x
    x = 799,532,147,724,000.25/18,870,421
  6. Step 6: Final answer
    x = 42,369,597.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.