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Finding the Fourth Proportional to 13,871.25, 20,812.11 and 8,328.45

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Solution

The fourth proportional to 13,871.25, 20,812.11 and 8,328.45 is: 12,495.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,871.25 : 20,812.11 = 8,328.45 : x
  2. Step 2: Convert to fraction form
    13,871.25/20,812.11 = 8,328.45/x
  3. Step 3: Cross multiply
    13,871.25x = 20,812.11 × 8,328.45
  4. Step 4: Simplify right side
    13,871.25x = 173,332,617.53
  5. Step 5: Solve for x
    x = 173,332,617.53/13,871.25
  6. Step 6: Final answer
    x = 12,495.82

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1.5x scale

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.