Home / 20,285.19-27,991.71-11,331.45

Finding the Fourth Proportional to 20,285.19, 27,991.71 and 11,331.45

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Solution

The fourth proportional to 20,285.19, 27,991.71 and 11,331.45 is: 15,636.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,285.19 : 27,991.71 = 11,331.45 : x
  2. Step 2: Convert to fraction form
    20,285.19/27,991.71 = 11,331.45/x
  3. Step 3: Cross multiply
    20,285.19x = 27,991.71 × 11,331.45
  4. Step 4: Simplify right side
    20,285.19x = 317,186,662.28
  5. Step 5: Solve for x
    x = 317,186,662.28/20,285.19
  6. Step 6: Final answer
    x = 15,636.37

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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.