Home / 13,821.20-20,731.68-8,276.12

Finding the Fourth Proportional to 13,821.20, 20,731.68 and 8,276.12

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Solution

The fourth proportional to 13,821.20, 20,731.68 and 8,276.12 is: 12,414.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,821.20 : 20,731.68 = 8,276.12 : x
  2. Step 2: Convert to fraction form
    13,821.20/20,731.68 = 8,276.12/x
  3. Step 3: Cross multiply
    13,821.20x = 20,731.68 × 8,276.12
  4. Step 4: Simplify right side
    13,821.20x = 171,577,871.48
  5. Step 5: Solve for x
    x = 171,577,871.48/13,821.20
  6. Step 6: Final answer
    x = 12,414.11

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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.