Home / 5,455.92-8,181.48-1,990.76

Finding the Fourth Proportional to 5,455.92, 8,181.48 and 1,990.76

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Solution

The fourth proportional to 5,455.92, 8,181.48 and 1,990.76 is: 2,985.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,455.92 : 8,181.48 = 1,990.76 : x
  2. Step 2: Convert to fraction form
    5,455.92/8,181.48 = 1,990.76/x
  3. Step 3: Cross multiply
    5,455.92x = 8,181.48 × 1,990.76
  4. Step 4: Simplify right side
    5,455.92x = 16,287,363.12
  5. Step 5: Solve for x
    x = 16,287,363.12/5,455.92
  6. Step 6: Final answer
    x = 2,985.26

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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.