Home / 8,112.20-12,168.30-1,956.20

Finding the Fourth Proportional to 8,112.20, 12,168.30 and 1,956.20

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Solution

The fourth proportional to 8,112.20, 12,168.30 and 1,956.20 is: 2,934.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.20 : 12,168.30 = 1,956.20 : x
  2. Step 2: Convert to fraction form
    8,112.20/12,168.30 = 1,956.20/x
  3. Step 3: Cross multiply
    8,112.20x = 12,168.30 × 1,956.20
  4. Step 4: Simplify right side
    8,112.20x = 23,803,628.46
  5. Step 5: Solve for x
    x = 23,803,628.46/8,112.20
  6. Step 6: Final answer
    x = 2,934.30

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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.