Home / 5,191.39-7,164.39-3,421.72

Finding the Fourth Proportional to 5,191.39, 7,164.39 and 3,421.72

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Solution

The fourth proportional to 5,191.39, 7,164.39 and 3,421.72 is: 4,722.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,191.39 : 7,164.39 = 3,421.72 : x
  2. Step 2: Convert to fraction form
    5,191.39/7,164.39 = 3,421.72/x
  3. Step 3: Cross multiply
    5,191.39x = 7,164.39 × 3,421.72
  4. Step 4: Simplify right side
    5,191.39x = 24,514,536.55
  5. Step 5: Solve for x
    x = 24,514,536.55/5,191.39
  6. Step 6: Final answer
    x = 4,722.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.