Home / 8,421.22-12,630.12-2,871.56

Finding the Fourth Proportional to 8,421.22, 12,630.12 and 2,871.56

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Solution

The fourth proportional to 8,421.22, 12,630.12 and 2,871.56 is: 4,306.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.22 : 12,630.12 = 2,871.56 : x
  2. Step 2: Convert to fraction form
    8,421.22/12,630.12 = 2,871.56/x
  3. Step 3: Cross multiply
    8,421.22x = 12,630.12 × 2,871.56
  4. Step 4: Simplify right side
    8,421.22x = 36,268,147.39
  5. Step 5: Solve for x
    x = 36,268,147.39/8,421.22
  6. Step 6: Final answer
    x = 4,306.76

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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.