Home / 12,180.57-18,270.85-4,389.18

Finding the Fourth Proportional to 12,180.57, 18,270.85 and 4,389.18

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Solution

The fourth proportional to 12,180.57, 18,270.85 and 4,389.18 is: 6,583.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,180.57 : 18,270.85 = 4,389.18 : x
  2. Step 2: Convert to fraction form
    12,180.57/18,270.85 = 4,389.18/x
  3. Step 3: Cross multiply
    12,180.57x = 18,270.85 × 4,389.18
  4. Step 4: Simplify right side
    12,180.57x = 80,194,049.40
  5. Step 5: Solve for x
    x = 80,194,049.40/12,180.57
  6. Step 6: Final answer
    x = 6,583.77

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Half scale
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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.