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Finding the Fourth Proportional to 12,863.76, 17,745.68 and 7,555.20

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Solution

The fourth proportional to 12,863.76, 17,745.68 and 7,555.20 is: 10,422.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,863.76 : 17,745.68 = 7,555.20 : x
  2. Step 2: Convert to fraction form
    12,863.76/17,745.68 = 7,555.20/x
  3. Step 3: Cross multiply
    12,863.76x = 17,745.68 × 7,555.20
  4. Step 4: Simplify right side
    12,863.76x = 134,072,161.54
  5. Step 5: Solve for x
    x = 134,072,161.54/12,863.76
  6. Step 6: Final answer
    x = 10,422.47

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Half scale
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Double scale
Find fourth proportional to 12,864.76, 17,747.06 and 7,556.20
Similar ratio
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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.