Home / 20,474.56-28,255.09-11,400.05

Finding the Fourth Proportional to 20,474.56, 28,255.09 and 11,400.05

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Solution

The fourth proportional to 20,474.56, 28,255.09 and 11,400.05 is: 15,732.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,474.56 : 28,255.09 = 11,400.05 : x
  2. Step 2: Convert to fraction form
    20,474.56/28,255.09 = 11,400.05/x
  3. Step 3: Cross multiply
    20,474.56x = 28,255.09 × 11,400.05
  4. Step 4: Simplify right side
    20,474.56x = 322,109,415.30
  5. Step 5: Solve for x
    x = 322,109,415.30/20,474.56
  6. Step 6: Final answer
    x = 15,732.18

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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.