Home / 43,680.32-65,520.12-12,515.60

Finding the Fourth Proportional to 43,680.32, 65,520.12 and 12,515.60

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Solution

The fourth proportional to 43,680.32, 65,520.12 and 12,515.60 is: 18,773.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,680.32 : 65,520.12 = 12,515.60 : x
  2. Step 2: Convert to fraction form
    43,680.32/65,520.12 = 12,515.60/x
  3. Step 3: Cross multiply
    43,680.32x = 65,520.12 × 12,515.60
  4. Step 4: Simplify right side
    43,680.32x = 820,023,613.87
  5. Step 5: Solve for x
    x = 820,023,613.87/43,680.32
  6. Step 6: Final answer
    x = 18,773.30

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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.