Home / 12,280.68-18,420.36-3,960.50

Finding the Fourth Proportional to 12,280.68, 18,420.36 and 3,960.50

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Solution

The fourth proportional to 12,280.68, 18,420.36 and 3,960.50 is: 5,940.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,280.68 : 18,420.36 = 3,960.50 : x
  2. Step 2: Convert to fraction form
    12,280.68/18,420.36 = 3,960.50/x
  3. Step 3: Cross multiply
    12,280.68x = 18,420.36 × 3,960.50
  4. Step 4: Simplify right side
    12,280.68x = 72,953,835.78
  5. Step 5: Solve for x
    x = 72,953,835.78/12,280.68
  6. Step 6: Final answer
    x = 5,940.54

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Double scale
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Similar ratio
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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.