Home / 5,421.21-8,119.19-5,271.57

Finding the Fourth Proportional to 5,421.21, 8,119.19 and 5,271.57

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Solution

The fourth proportional to 5,421.21, 8,119.19 and 5,271.57 is: 7,895.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.21 : 8,119.19 = 5,271.57 : x
  2. Step 2: Convert to fraction form
    5,421.21/8,119.19 = 5,271.57/x
  3. Step 3: Cross multiply
    5,421.21x = 8,119.19 × 5,271.57
  4. Step 4: Simplify right side
    5,421.21x = 42,800,863.96
  5. Step 5: Solve for x
    x = 42,800,863.96/5,421.21
  6. Step 6: Final answer
    x = 7,895.07

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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.