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Finding the Fourth Proportional to 20,364.45, 30,537.01 and 7,890.31

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Solution

The fourth proportional to 20,364.45, 30,537.01 and 7,890.31 is: 11,831.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,364.45 : 30,537.01 = 7,890.31 : x
  2. Step 2: Convert to fraction form
    20,364.45/30,537.01 = 7,890.31/x
  3. Step 3: Cross multiply
    20,364.45x = 30,537.01 × 7,890.31
  4. Step 4: Simplify right side
    20,364.45x = 240,946,475.37
  5. Step 5: Solve for x
    x = 240,946,475.37/20,364.45
  6. Step 6: Final answer
    x = 11,831.72

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