Home / 8,220.42-11,330.37-6,230.34

Finding the Fourth Proportional to 8,220.42, 11,330.37 and 6,230.34

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Solution

The fourth proportional to 8,220.42, 11,330.37 and 6,230.34 is: 8,587.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,220.42 : 11,330.37 = 6,230.34 : x
  2. Step 2: Convert to fraction form
    8,220.42/11,330.37 = 6,230.34/x
  3. Step 3: Cross multiply
    8,220.42x = 11,330.37 × 6,230.34
  4. Step 4: Simplify right side
    8,220.42x = 70,592,057.43
  5. Step 5: Solve for x
    x = 70,592,057.43/8,220.42
  6. Step 6: Final answer
    x = 8,587.40

Related Problems

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Half scale
Find fourth proportional to 16,440.84, 22,660.74 and 12,460.68
Double scale
Find fourth proportional to 8,221.42, 11,331.75 and 6,231.34
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.