Home / 13,680.37-20,520.57-4,321.35

Finding the Fourth Proportional to 13,680.37, 20,520.57 and 4,321.35

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Solution

The fourth proportional to 13,680.37, 20,520.57 and 4,321.35 is: 6,482.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.37 : 20,520.57 = 4,321.35 : x
  2. Step 2: Convert to fraction form
    13,680.37/20,520.57 = 4,321.35/x
  3. Step 3: Cross multiply
    13,680.37x = 20,520.57 × 4,321.35
  4. Step 4: Simplify right side
    13,680.37x = 88,676,446.36
  5. Step 5: Solve for x
    x = 88,676,446.36/13,680.37
  6. Step 6: Final answer
    x = 6,482.02

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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.