Home / 5,451.70-8,177.55-1,990.30

Finding the Fourth Proportional to 5,451.70, 8,177.55 and 1,990.30

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Solution

The fourth proportional to 5,451.70, 8,177.55 and 1,990.30 is: 2,985.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,451.70 : 8,177.55 = 1,990.30 : x
  2. Step 2: Convert to fraction form
    5,451.70/8,177.55 = 1,990.30/x
  3. Step 3: Cross multiply
    5,451.70x = 8,177.55 × 1,990.30
  4. Step 4: Simplify right side
    5,451.70x = 16,275,777.77
  5. Step 5: Solve for x
    x = 16,275,777.77/5,451.70
  6. Step 6: Final answer
    x = 2,985.45

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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.