Home / 8,320.68-12,479.67-2,772.72

Finding the Fourth Proportional to 8,320.68, 12,479.67 and 2,772.72

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Solution

The fourth proportional to 8,320.68, 12,479.67 and 2,772.72 is: 4,158.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.68 : 12,479.67 = 2,772.72 : x
  2. Step 2: Convert to fraction form
    8,320.68/12,479.67 = 2,772.72/x
  3. Step 3: Cross multiply
    8,320.68x = 12,479.67 × 2,772.72
  4. Step 4: Simplify right side
    8,320.68x = 34,602,630.60
  5. Step 5: Solve for x
    x = 34,602,630.60/8,320.68
  6. Step 6: Final answer
    x = 4,158.63

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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.