Home / 5,451.79-8,181.32-1,989.04

Finding the Fourth Proportional to 5,451.79, 8,181.32 and 1,989.04

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Solution

The fourth proportional to 5,451.79, 8,181.32 and 1,989.04 is: 2,984.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,451.79 : 8,181.32 = 1,989.04 : x
  2. Step 2: Convert to fraction form
    5,451.79/8,181.32 = 1,989.04/x
  3. Step 3: Cross multiply
    5,451.79x = 8,181.32 × 1,989.04
  4. Step 4: Simplify right side
    5,451.79x = 16,272,972.73
  5. Step 5: Solve for x
    x = 16,272,972.73/5,451.79
  6. Step 6: Final answer
    x = 2,984.89

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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.