Home / 20,749.80-28,633.32-11,318.16

Finding the Fourth Proportional to 20,749.80, 28,633.32 and 11,318.16

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Solution

The fourth proportional to 20,749.80, 28,633.32 and 11,318.16 is: 15,618.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.80 : 28,633.32 = 11,318.16 : x
  2. Step 2: Convert to fraction form
    20,749.80/28,633.32 = 11,318.16/x
  3. Step 3: Cross multiply
    20,749.80x = 28,633.32 × 11,318.16
  4. Step 4: Simplify right side
    20,749.80x = 324,076,497.09
  5. Step 5: Solve for x
    x = 324,076,497.09/20,749.80
  6. Step 6: Final answer
    x = 15,618.29

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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.