Home / 12,285.82-18,431.61-3,520.51

Finding the Fourth Proportional to 12,285.82, 18,431.61 and 3,520.51

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Solution

The fourth proportional to 12,285.82, 18,431.61 and 3,520.51 is: 5,281.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,285.82 : 18,431.61 = 3,520.51 : x
  2. Step 2: Convert to fraction form
    12,285.82/18,431.61 = 3,520.51/x
  3. Step 3: Cross multiply
    12,285.82x = 18,431.61 × 3,520.51
  4. Step 4: Simplify right side
    12,285.82x = 64,888,621.24
  5. Step 5: Solve for x
    x = 64,888,621.24/12,285.82
  6. Step 6: Final answer
    x = 5,281.59

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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.