Home / 8,421.80-12,625.83-3,153.85

Finding the Fourth Proportional to 8,421.80, 12,625.83 and 3,153.85

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Solution

The fourth proportional to 8,421.80, 12,625.83 and 3,153.85 is: 4,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.80 : 12,625.83 = 3,153.85 : x
  2. Step 2: Convert to fraction form
    8,421.80/12,625.83 = 3,153.85/x
  3. Step 3: Cross multiply
    8,421.80x = 12,625.83 × 3,153.85
  4. Step 4: Simplify right side
    8,421.80x = 39,819,942.38
  5. Step 5: Solve for x
    x = 39,819,942.38/8,421.80
  6. Step 6: Final answer
    x = 4,728.20

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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.