Home / 20,749.57-28,633.54-11,318.13

Finding the Fourth Proportional to 20,749.57, 28,633.54 and 11,318.13

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Solution

The fourth proportional to 20,749.57, 28,633.54 and 11,318.13 is: 15,618.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.57 : 28,633.54 = 11,318.13 : x
  2. Step 2: Convert to fraction form
    20,749.57/28,633.54 = 11,318.13/x
  3. Step 3: Cross multiply
    20,749.57x = 28,633.54 × 11,318.13
  4. Step 4: Simplify right side
    20,749.57x = 324,078,128.08
  5. Step 5: Solve for x
    x = 324,078,128.08/20,749.57
  6. Step 6: Final answer
    x = 15,618.55

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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.