Home / 20,400.06-28,144.89-13,323.90

Finding the Fourth Proportional to 20,400.06, 28,144.89 and 13,323.90

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Solution

The fourth proportional to 20,400.06, 28,144.89 and 13,323.90 is: 18,382.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.06 : 28,144.89 = 13,323.90 : x
  2. Step 2: Convert to fraction form
    20,400.06/28,144.89 = 13,323.90/x
  3. Step 3: Cross multiply
    20,400.06x = 28,144.89 × 13,323.90
  4. Step 4: Simplify right side
    20,400.06x = 374,999,699.87
  5. Step 5: Solve for x
    x = 374,999,699.87/20,400.06
  6. Step 6: Final answer
    x = 18,382.28

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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.