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Finding the Fourth Proportional to 12,580.49, 18,871.37 and 3,220.58

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Solution

The fourth proportional to 12,580.49, 18,871.37 and 3,220.58 is: 4,831.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,580.49 : 18,871.37 = 3,220.58 : x
  2. Step 2: Convert to fraction form
    12,580.49/18,871.37 = 3,220.58/x
  3. Step 3: Cross multiply
    12,580.49x = 18,871.37 × 3,220.58
  4. Step 4: Simplify right side
    12,580.49x = 60,776,740.69
  5. Step 5: Solve for x
    x = 60,776,740.69/12,580.49
  6. Step 6: Final answer
    x = 4,831.03

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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.