Home / 14,771.55-20,385.96-8,400.15

Finding the Fourth Proportional to 14,771.55, 20,385.96 and 8,400.15

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Solution

The fourth proportional to 14,771.55, 20,385.96 and 8,400.15 is: 11,592.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,771.55 : 20,385.96 = 8,400.15 : x
  2. Step 2: Convert to fraction form
    14,771.55/20,385.96 = 8,400.15/x
  3. Step 3: Cross multiply
    14,771.55x = 20,385.96 × 8,400.15
  4. Step 4: Simplify right side
    14,771.55x = 171,245,121.89
  5. Step 5: Solve for x
    x = 171,245,121.89/14,771.55
  6. Step 6: Final answer
    x = 11,592.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.