Home / 8,421.12-12,628.21-2,874.91

Finding the Fourth Proportional to 8,421.12, 12,628.21 and 2,874.91

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Solution

The fourth proportional to 8,421.12, 12,628.21 and 2,874.91 is: 4,311.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.12 : 12,628.21 = 2,874.91 : x
  2. Step 2: Convert to fraction form
    8,421.12/12,628.21 = 2,874.91/x
  3. Step 3: Cross multiply
    8,421.12x = 12,628.21 × 2,874.91
  4. Step 4: Simplify right side
    8,421.12x = 36,304,984.95
  5. Step 5: Solve for x
    x = 36,304,984.95/8,421.12
  6. Step 6: Final answer
    x = 4,311.18

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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.