Home / 5,451.85-8,178.99-1,989.10

Finding the Fourth Proportional to 5,451.85, 8,178.99 and 1,989.10

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Solution

The fourth proportional to 5,451.85, 8,178.99 and 1,989.10 is: 2,984.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,451.85 : 8,178.99 = 1,989.10 : x
  2. Step 2: Convert to fraction form
    5,451.85/8,178.99 = 1,989.10/x
  3. Step 3: Cross multiply
    5,451.85x = 8,178.99 × 1,989.10
  4. Step 4: Simplify right side
    5,451.85x = 16,268,829.01
  5. Step 5: Solve for x
    x = 16,268,829.01/5,451.85
  6. Step 6: Final answer
    x = 2,984.09

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.