Home / 13,956.20-20,934.30-8,119.40

Finding the Fourth Proportional to 13,956.20, 20,934.30 and 8,119.40

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Solution

The fourth proportional to 13,956.20, 20,934.30 and 8,119.40 is: 12,179.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,956.20 : 20,934.30 = 8,119.40 : x
  2. Step 2: Convert to fraction form
    13,956.20/20,934.30 = 8,119.40/x
  3. Step 3: Cross multiply
    13,956.20x = 20,934.30 × 8,119.40
  4. Step 4: Simplify right side
    13,956.20x = 169,973,955.42
  5. Step 5: Solve for x
    x = 169,973,955.42/13,956.20
  6. Step 6: Final answer
    x = 12,179.10

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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.