Home / 12,285.45-18,428.10-3,520.38

Finding the Fourth Proportional to 12,285.45, 18,428.10 and 3,520.38

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Solution

The fourth proportional to 12,285.45, 18,428.10 and 3,520.38 is: 5,280.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,285.45 : 18,428.10 = 3,520.38 : x
  2. Step 2: Convert to fraction form
    12,285.45/18,428.10 = 3,520.38/x
  3. Step 3: Cross multiply
    12,285.45x = 18,428.10 × 3,520.38
  4. Step 4: Simplify right side
    12,285.45x = 64,873,914.68
  5. Step 5: Solve for x
    x = 64,873,914.68/12,285.45
  6. Step 6: Final answer
    x = 5,280.55

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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.