Home / 12,405.58-18,608.01-3,640.66

Finding the Fourth Proportional to 12,405.58, 18,608.01 and 3,640.66

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Solution

The fourth proportional to 12,405.58, 18,608.01 and 3,640.66 is: 5,460.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.58 : 18,608.01 = 3,640.66 : x
  2. Step 2: Convert to fraction form
    12,405.58/18,608.01 = 3,640.66/x
  3. Step 3: Cross multiply
    12,405.58x = 18,608.01 × 3,640.66
  4. Step 4: Simplify right side
    12,405.58x = 67,745,437.69
  5. Step 5: Solve for x
    x = 67,745,437.69/12,405.58
  6. Step 6: Final answer
    x = 5,460.88

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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.