Home / 12,211.53-18,316.28-3,891.21

Finding the Fourth Proportional to 12,211.53, 18,316.28 and 3,891.21

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Solution

The fourth proportional to 12,211.53, 18,316.28 and 3,891.21 is: 5,836.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,211.53 : 18,316.28 = 3,891.21 : x
  2. Step 2: Convert to fraction form
    12,211.53/18,316.28 = 3,891.21/x
  3. Step 3: Cross multiply
    12,211.53x = 18,316.28 × 3,891.21
  4. Step 4: Simplify right side
    12,211.53x = 71,272,472.44
  5. Step 5: Solve for x
    x = 71,272,472.44/12,211.53
  6. Step 6: Final answer
    x = 5,836.49

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Double scale
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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.