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Finding the Fourth Proportional to 13,948.40, 20,944.20 and 8,116.40

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Solution

The fourth proportional to 13,948.40, 20,944.20 and 8,116.40 is: 12,187.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,948.40 : 20,944.20 = 8,116.40 : x
  2. Step 2: Convert to fraction form
    13,948.40/20,944.20 = 8,116.40/x
  3. Step 3: Cross multiply
    13,948.40x = 20,944.20 × 8,116.40
  4. Step 4: Simplify right side
    13,948.40x = 169,991,504.88
  5. Step 5: Solve for x
    x = 169,991,504.88/13,948.40
  6. Step 6: Final answer
    x = 12,187.17

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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.