Home / 5,379.90-8,069.21-1,431.45

Finding the Fourth Proportional to 5,379.90, 8,069.21 and 1,431.45

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Solution

The fourth proportional to 5,379.90, 8,069.21 and 1,431.45 is: 2,147.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,379.90 : 8,069.21 = 1,431.45 : x
  2. Step 2: Convert to fraction form
    5,379.90/8,069.21 = 1,431.45/x
  3. Step 3: Cross multiply
    5,379.90x = 8,069.21 × 1,431.45
  4. Step 4: Simplify right side
    5,379.90x = 11,550,668.87
  5. Step 5: Solve for x
    x = 11,550,668.87/5,379.90
  6. Step 6: Final answer
    x = 2,147.00

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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.