Home / 5,421.10-8,131.65-2,505.10

Finding the Fourth Proportional to 5,421.10, 8,131.65 and 2,505.10

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Solution

The fourth proportional to 5,421.10, 8,131.65 and 2,505.10 is: 3,757.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.10 : 8,131.65 = 2,505.10 : x
  2. Step 2: Convert to fraction form
    5,421.10/8,131.65 = 2,505.10/x
  3. Step 3: Cross multiply
    5,421.10x = 8,131.65 × 2,505.10
  4. Step 4: Simplify right side
    5,421.10x = 20,370,596.42
  5. Step 5: Solve for x
    x = 20,370,596.42/5,421.10
  6. Step 6: Final answer
    x = 3,757.65

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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.