Home / 12,405.72-18,608.76-3,640.80

Finding the Fourth Proportional to 12,405.72, 18,608.76 and 3,640.80

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Solution

The fourth proportional to 12,405.72, 18,608.76 and 3,640.80 is: 5,461.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.72 : 18,608.76 = 3,640.80 : x
  2. Step 2: Convert to fraction form
    12,405.72/18,608.76 = 3,640.80/x
  3. Step 3: Cross multiply
    12,405.72x = 18,608.76 × 3,640.80
  4. Step 4: Simplify right side
    12,405.72x = 67,750,773.41
  5. Step 5: Solve for x
    x = 67,750,773.41/12,405.72
  6. Step 6: Final answer
    x = 5,461.25

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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.