Home / 21,190.20-29,243.85-11,758.77

Finding the Fourth Proportional to 21,190.20, 29,243.85 and 11,758.77

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Solution

The fourth proportional to 21,190.20, 29,243.85 and 11,758.77 is: 16,227.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.20 : 29,243.85 = 11,758.77 : x
  2. Step 2: Convert to fraction form
    21,190.20/29,243.85 = 11,758.77/x
  3. Step 3: Cross multiply
    21,190.20x = 29,243.85 × 11,758.77
  4. Step 4: Simplify right side
    21,190.20x = 343,871,567.00
  5. Step 5: Solve for x
    x = 343,871,567.00/21,190.20
  6. Step 6: Final answer
    x = 16,227.86

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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.