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Finding the Fourth Proportional to 28,605.54, 42,912.41 and 10,831.41

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Solution

The fourth proportional to 28,605.54, 42,912.41 and 10,831.41 is: 16,248.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,605.54 : 42,912.41 = 10,831.41 : x
  2. Step 2: Convert to fraction form
    28,605.54/42,912.41 = 10,831.41/x
  3. Step 3: Cross multiply
    28,605.54x = 42,912.41 × 10,831.41
  4. Step 4: Simplify right side
    28,605.54x = 464,801,852.64
  5. Step 5: Solve for x
    x = 464,801,852.64/28,605.54
  6. Step 6: Final answer
    x = 16,248.67

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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.