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Finding the Fourth Proportional to 13,679.58, 20,522.13 and 4,321.05

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Solution

The fourth proportional to 13,679.58, 20,522.13 and 4,321.05 is: 6,482.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.58 : 20,522.13 = 4,321.05 : x
  2. Step 2: Convert to fraction form
    13,679.58/20,522.13 = 4,321.05/x
  3. Step 3: Cross multiply
    13,679.58x = 20,522.13 × 4,321.05
  4. Step 4: Simplify right side
    13,679.58x = 88,677,149.84
  5. Step 5: Solve for x
    x = 88,677,149.84/13,679.58
  6. Step 6: Final answer
    x = 6,482.45

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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.