Home / 20,688.72-28,550.61-11,736.24

Finding the Fourth Proportional to 20,688.72, 28,550.61 and 11,736.24

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Solution

The fourth proportional to 20,688.72, 28,550.61 and 11,736.24 is: 16,196.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.72 : 28,550.61 = 11,736.24 : x
  2. Step 2: Convert to fraction form
    20,688.72/28,550.61 = 11,736.24/x
  3. Step 3: Cross multiply
    20,688.72x = 28,550.61 × 11,736.24
  4. Step 4: Simplify right side
    20,688.72x = 335,076,811.11
  5. Step 5: Solve for x
    x = 335,076,811.11/20,688.72
  6. Step 6: Final answer
    x = 16,196.11

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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.