Home / 20,434.96-28,189.64-13,722.92

Finding the Fourth Proportional to 20,434.96, 28,189.64 and 13,722.92

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Solution

The fourth proportional to 20,434.96, 28,189.64 and 13,722.92 is: 18,930.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,434.96 : 28,189.64 = 13,722.92 : x
  2. Step 2: Convert to fraction form
    20,434.96/28,189.64 = 13,722.92/x
  3. Step 3: Cross multiply
    20,434.96x = 28,189.64 × 13,722.92
  4. Step 4: Simplify right side
    20,434.96x = 386,844,174.55
  5. Step 5: Solve for x
    x = 386,844,174.55/20,434.96
  6. Step 6: Final answer
    x = 18,930.51

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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.