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Finding the Fourth Proportional to 8,423.46, 12,635.22 and 8,220.48

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Solution

The fourth proportional to 8,423.46, 12,635.22 and 8,220.48 is: 12,330.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,423.46 : 12,635.22 = 8,220.48 : x
  2. Step 2: Convert to fraction form
    8,423.46/12,635.22 = 8,220.48/x
  3. Step 3: Cross multiply
    8,423.46x = 12,635.22 × 8,220.48
  4. Step 4: Simplify right side
    8,423.46x = 103,867,573.31
  5. Step 5: Solve for x
    x = 103,867,573.31/8,423.46
  6. Step 6: Final answer
    x = 12,330.75

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Half scale
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Double scale
Find fourth proportional to 8,424.46, 12,636.72 and 8,221.48
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.