Home / 5,379.87-8,070.18-1,431.09

Finding the Fourth Proportional to 5,379.87, 8,070.18 and 1,431.09

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Solution

The fourth proportional to 5,379.87, 8,070.18 and 1,431.09 is: 2,146.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,379.87 : 8,070.18 = 1,431.09 : x
  2. Step 2: Convert to fraction form
    5,379.87/8,070.18 = 1,431.09/x
  3. Step 3: Cross multiply
    5,379.87x = 8,070.18 × 1,431.09
  4. Step 4: Simplify right side
    5,379.87x = 11,549,153.90
  5. Step 5: Solve for x
    x = 11,549,153.90/5,379.87
  6. Step 6: Final answer
    x = 2,146.73

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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.