Home / 13,211.54-18,231.88-7,243.19

Finding the Fourth Proportional to 13,211.54, 18,231.88 and 7,243.19

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Solution

The fourth proportional to 13,211.54, 18,231.88 and 7,243.19 is: 9,995.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.54 : 18,231.88 = 7,243.19 : x
  2. Step 2: Convert to fraction form
    13,211.54/18,231.88 = 7,243.19/x
  3. Step 3: Cross multiply
    13,211.54x = 18,231.88 × 7,243.19
  4. Step 4: Simplify right side
    13,211.54x = 132,056,970.90
  5. Step 5: Solve for x
    x = 132,056,970.90/13,211.54
  6. Step 6: Final answer
    x = 9,995.58

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.