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Finding the Fourth Proportional to 14,052.60, 21,078.90 and 8,220.60

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Solution

The fourth proportional to 14,052.60, 21,078.90 and 8,220.60 is: 12,330.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,052.60 : 21,078.90 = 8,220.60 : x
  2. Step 2: Convert to fraction form
    14,052.60/21,078.90 = 8,220.60/x
  3. Step 3: Cross multiply
    14,052.60x = 21,078.90 × 8,220.60
  4. Step 4: Simplify right side
    14,052.60x = 173,281,205.34
  5. Step 5: Solve for x
    x = 173,281,205.34/14,052.60
  6. Step 6: Final answer
    x = 12,330.90

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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.