Home / 20,489.39-28,274.94-11,536.69

Finding the Fourth Proportional to 20,489.39, 28,274.94 and 11,536.69

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Solution

The fourth proportional to 20,489.39, 28,274.94 and 11,536.69 is: 15,920.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.39 : 28,274.94 = 11,536.69 : x
  2. Step 2: Convert to fraction form
    20,489.39/28,274.94 = 11,536.69/x
  3. Step 3: Cross multiply
    20,489.39x = 28,274.94 × 11,536.69
  4. Step 4: Simplify right side
    20,489.39x = 326,199,217.55
  5. Step 5: Solve for x
    x = 326,199,217.55/20,489.39
  6. Step 6: Final answer
    x = 15,920.40

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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.