Home / 20,965.44-31,434.60-11,109.36

Finding the Fourth Proportional to 20,965.44, 31,434.60 and 11,109.36

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Solution

The fourth proportional to 20,965.44, 31,434.60 and 11,109.36 is: 16,656.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.44 : 31,434.60 = 11,109.36 : x
  2. Step 2: Convert to fraction form
    20,965.44/31,434.60 = 11,109.36/x
  3. Step 3: Cross multiply
    20,965.44x = 31,434.60 × 11,109.36
  4. Step 4: Simplify right side
    20,965.44x = 349,218,287.86
  5. Step 5: Solve for x
    x = 349,218,287.86/20,965.44
  6. Step 6: Final answer
    x = 16,656.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.