Home / 8,421.39-12,636.65-3,494.41

Finding the Fourth Proportional to 8,421.39, 12,636.65 and 3,494.41

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Solution

The fourth proportional to 8,421.39, 12,636.65 and 3,494.41 is: 5,243.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.39 : 12,636.65 = 3,494.41 : x
  2. Step 2: Convert to fraction form
    8,421.39/12,636.65 = 3,494.41/x
  3. Step 3: Cross multiply
    8,421.39x = 12,636.65 × 3,494.41
  4. Step 4: Simplify right side
    8,421.39x = 44,157,613.27
  5. Step 5: Solve for x
    x = 44,157,613.27/8,421.39
  6. Step 6: Final answer
    x = 5,243.51

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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.