Home / 5,419.24-8,128.56-1,909.42

Finding the Fourth Proportional to 5,419.24, 8,128.56 and 1,909.42

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Solution

The fourth proportional to 5,419.24, 8,128.56 and 1,909.42 is: 2,864.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.24 : 8,128.56 = 1,909.42 : x
  2. Step 2: Convert to fraction form
    5,419.24/8,128.56 = 1,909.42/x
  3. Step 3: Cross multiply
    5,419.24x = 8,128.56 × 1,909.42
  4. Step 4: Simplify right side
    5,419.24x = 15,520,835.04
  5. Step 5: Solve for x
    x = 15,520,835.04/5,419.24
  6. Step 6: Final answer
    x = 2,864.02

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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.