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Finding the Third Proportional to 20,435 and 31,246.50

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Solution

The third proportional to 20,435 and 31,246.50 is: 47,778.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,435 : 31,246.50 = 31,246.50 : x
  2. Step 2: Convert to fraction form
    20,435/31,246.50 = 31,246.50/x
  3. Step 3: Cross multiply
    20,435x = 31,246.50 × 31,246.50
  4. Step 4: Simplify right side
    20,435x = 976,343,762.25
  5. Step 5: Solve for x
    x = 976,343,762.25/20,435
  6. Step 6: Final answer
    x = 47,778.02

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.