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Finding the Fourth Proportional to 13,281.60, 19,915.20 and 5,481.60

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Solution

The fourth proportional to 13,281.60, 19,915.20 and 5,481.60 is: 8,219.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.60 : 19,915.20 = 5,481.60 : x
  2. Step 2: Convert to fraction form
    13,281.60/19,915.20 = 5,481.60/x
  3. Step 3: Cross multiply
    13,281.60x = 19,915.20 × 5,481.60
  4. Step 4: Simplify right side
    13,281.60x = 109,167,160.32
  5. Step 5: Solve for x
    x = 109,167,160.32/13,281.60
  6. Step 6: Final answer
    x = 8,219.43

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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.