Home / 20,427.94-28,190.34-11,353.25

Finding the Fourth Proportional to 20,427.94, 28,190.34 and 11,353.25

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Solution

The fourth proportional to 20,427.94, 28,190.34 and 11,353.25 is: 15,667.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.94 : 28,190.34 = 11,353.25 : x
  2. Step 2: Convert to fraction form
    20,427.94/28,190.34 = 11,353.25/x
  3. Step 3: Cross multiply
    20,427.94x = 28,190.34 × 11,353.25
  4. Step 4: Simplify right side
    20,427.94x = 320,051,977.61
  5. Step 5: Solve for x
    x = 320,051,977.61/20,427.94
  6. Step 6: Final answer
    x = 15,667.36

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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.