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Finding the Fourth Proportional to 13,281.84, 19,915.08 and 5,481.84

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Solution

The fourth proportional to 13,281.84, 19,915.08 and 5,481.84 is: 8,219.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.84 : 19,915.08 = 5,481.84 : x
  2. Step 2: Convert to fraction form
    13,281.84/19,915.08 = 5,481.84/x
  3. Step 3: Cross multiply
    13,281.84x = 19,915.08 × 5,481.84
  4. Step 4: Simplify right side
    13,281.84x = 109,171,282.15
  5. Step 5: Solve for x
    x = 109,171,282.15/13,281.84
  6. Step 6: Final answer
    x = 8,219.59

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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.