Home / 20,811.24-28,719.54-11,736.72

Finding the Fourth Proportional to 20,811.24, 28,719.54 and 11,736.72

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Solution

The fourth proportional to 20,811.24, 28,719.54 and 11,736.72 is: 16,196.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.24 : 28,719.54 = 11,736.72 : x
  2. Step 2: Convert to fraction form
    20,811.24/28,719.54 = 11,736.72/x
  3. Step 3: Cross multiply
    20,811.24x = 28,719.54 × 11,736.72
  4. Step 4: Simplify right side
    20,811.24x = 337,073,199.51
  5. Step 5: Solve for x
    x = 337,073,199.51/20,811.24
  6. Step 6: Final answer
    x = 16,196.69

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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.