Home / 18,689.78-25,793.96-11,518.25

Finding the Fourth Proportional to 18,689.78, 25,793.96 and 11,518.25

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Solution

The fourth proportional to 18,689.78, 25,793.96 and 11,518.25 is: 15,896.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.78 : 25,793.96 = 11,518.25 : x
  2. Step 2: Convert to fraction form
    18,689.78/25,793.96 = 11,518.25/x
  3. Step 3: Cross multiply
    18,689.78x = 25,793.96 × 11,518.25
  4. Step 4: Simplify right side
    18,689.78x = 297,101,093.21
  5. Step 5: Solve for x
    x = 297,101,093.21/18,689.78
  6. Step 6: Final answer
    x = 15,896.44

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.