Home / 20,832.30-28,748.34-11,400.75

Finding the Fourth Proportional to 20,832.30, 28,748.34 and 11,400.75

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Solution

The fourth proportional to 20,832.30, 28,748.34 and 11,400.75 is: 15,732.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,832.30 : 28,748.34 = 11,400.75 : x
  2. Step 2: Convert to fraction form
    20,832.30/28,748.34 = 11,400.75/x
  3. Step 3: Cross multiply
    20,832.30x = 28,748.34 × 11,400.75
  4. Step 4: Simplify right side
    20,832.30x = 327,752,637.26
  5. Step 5: Solve for x
    x = 327,752,637.26/20,832.30
  6. Step 6: Final answer
    x = 15,732.91

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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.