Home / 7,898.50-11,847.75-3,221.05

Finding the Fourth Proportional to 7,898.50, 11,847.75 and 3,221.05

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Solution

The fourth proportional to 7,898.50, 11,847.75 and 3,221.05 is: 4,831.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,898.50 : 11,847.75 = 3,221.05 : x
  2. Step 2: Convert to fraction form
    7,898.50/11,847.75 = 3,221.05/x
  3. Step 3: Cross multiply
    7,898.50x = 11,847.75 × 3,221.05
  4. Step 4: Simplify right side
    7,898.50x = 38,162,195.14
  5. Step 5: Solve for x
    x = 38,162,195.14/7,898.50
  6. Step 6: Final answer
    x = 4,831.58

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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.