Home / 5,478.67-8,212.81-1,778.32

Finding the Fourth Proportional to 5,478.67, 8,212.81 and 1,778.32

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Solution

The fourth proportional to 5,478.67, 8,212.81 and 1,778.32 is: 2,665.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.67 : 8,212.81 = 1,778.32 : x
  2. Step 2: Convert to fraction form
    5,478.67/8,212.81 = 1,778.32/x
  3. Step 3: Cross multiply
    5,478.67x = 8,212.81 × 1,778.32
  4. Step 4: Simplify right side
    5,478.67x = 14,604,967.24
  5. Step 5: Solve for x
    x = 14,604,967.24/5,478.67
  6. Step 6: Final answer
    x = 2,665.79

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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.