Home / 20,216.91-27,899.40-11,720.70

Finding the Fourth Proportional to 20,216.91, 27,899.40 and 11,720.70

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Solution

The fourth proportional to 20,216.91, 27,899.40 and 11,720.70 is: 16,174.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,216.91 : 27,899.40 = 11,720.70 : x
  2. Step 2: Convert to fraction form
    20,216.91/27,899.40 = 11,720.70/x
  3. Step 3: Cross multiply
    20,216.91x = 27,899.40 × 11,720.70
  4. Step 4: Simplify right side
    20,216.91x = 327,000,497.58
  5. Step 5: Solve for x
    x = 327,000,497.58/20,216.91
  6. Step 6: Final answer
    x = 16,174.60

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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.