Home / 20,409.48-28,171.20-11,913.90

Finding the Fourth Proportional to 20,409.48, 28,171.20 and 11,913.90

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Solution

The fourth proportional to 20,409.48, 28,171.20 and 11,913.90 is: 16,444.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.48 : 28,171.20 = 11,913.90 : x
  2. Step 2: Convert to fraction form
    20,409.48/28,171.20 = 11,913.90/x
  3. Step 3: Cross multiply
    20,409.48x = 28,171.20 × 11,913.90
  4. Step 4: Simplify right side
    20,409.48x = 335,628,859.68
  5. Step 5: Solve for x
    x = 335,628,859.68/20,409.48
  6. Step 6: Final answer
    x = 16,444.75

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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.