Home / 5,380.15-8,069.58-1,431.70

Finding the Fourth Proportional to 5,380.15, 8,069.58 and 1,431.70

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Solution

The fourth proportional to 5,380.15, 8,069.58 and 1,431.70 is: 2,147.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,380.15 : 8,069.58 = 1,431.70 : x
  2. Step 2: Convert to fraction form
    5,380.15/8,069.58 = 1,431.70/x
  3. Step 3: Cross multiply
    5,380.15x = 8,069.58 × 1,431.70
  4. Step 4: Simplify right side
    5,380.15x = 11,553,221.27
  5. Step 5: Solve for x
    x = 11,553,221.27/5,380.15
  6. Step 6: Final answer
    x = 2,147.38

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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.