Home / 5,280.68-7,919.66-1,992.80

Finding the Fourth Proportional to 5,280.68, 7,919.66 and 1,992.80

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Solution

The fourth proportional to 5,280.68, 7,919.66 and 1,992.80 is: 2,988.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.68 : 7,919.66 = 1,992.80 : x
  2. Step 2: Convert to fraction form
    5,280.68/7,919.66 = 1,992.80/x
  3. Step 3: Cross multiply
    5,280.68x = 7,919.66 × 1,992.80
  4. Step 4: Simplify right side
    5,280.68x = 15,782,298.45
  5. Step 5: Solve for x
    x = 15,782,298.45/5,280.68
  6. Step 6: Final answer
    x = 2,988.69

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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.