Home / 5,421.57-8,133.35-1,911.68

Finding the Fourth Proportional to 5,421.57, 8,133.35 and 1,911.68

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Solution

The fourth proportional to 5,421.57, 8,133.35 and 1,911.68 is: 2,867.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.57 : 8,133.35 = 1,911.68 : x
  2. Step 2: Convert to fraction form
    5,421.57/8,133.35 = 1,911.68/x
  3. Step 3: Cross multiply
    5,421.57x = 8,133.35 × 1,911.68
  4. Step 4: Simplify right side
    5,421.57x = 15,548,342.80
  5. Step 5: Solve for x
    x = 15,548,342.80/5,421.57
  6. Step 6: Final answer
    x = 2,867.87

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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.