Home / 8,079.71-12,120.20-2,156.61

Finding the Fourth Proportional to 8,079.71, 12,120.20 and 2,156.61

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Solution

The fourth proportional to 8,079.71, 12,120.20 and 2,156.61 is: 3,235.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,079.71 : 12,120.20 = 2,156.61 : x
  2. Step 2: Convert to fraction form
    8,079.71/12,120.20 = 2,156.61/x
  3. Step 3: Cross multiply
    8,079.71x = 12,120.20 × 2,156.61
  4. Step 4: Simplify right side
    8,079.71x = 26,138,533.74
  5. Step 5: Solve for x
    x = 26,138,533.74/8,079.71
  6. Step 6: Final answer
    x = 3,235.09

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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.