Home / 8,420.27-12,628.58-3,155.09

Finding the Fourth Proportional to 8,420.27, 12,628.58 and 3,155.09

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Solution

The fourth proportional to 8,420.27, 12,628.58 and 3,155.09 is: 4,731.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.27 : 12,628.58 = 3,155.09 : x
  2. Step 2: Convert to fraction form
    8,420.27/12,628.58 = 3,155.09/x
  3. Step 3: Cross multiply
    8,420.27x = 12,628.58 × 3,155.09
  4. Step 4: Simplify right side
    8,420.27x = 39,844,227.55
  5. Step 5: Solve for x
    x = 39,844,227.55/8,420.27
  6. Step 6: Final answer
    x = 4,731.94

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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.