Home / 20,750.72-28,635.44-11,319.28

Finding the Fourth Proportional to 20,750.72, 28,635.44 and 11,319.28

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Solution

The fourth proportional to 20,750.72, 28,635.44 and 11,319.28 is: 15,620.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.72 : 28,635.44 = 11,319.28 : x
  2. Step 2: Convert to fraction form
    20,750.72/28,635.44 = 11,319.28/x
  3. Step 3: Cross multiply
    20,750.72x = 28,635.44 × 11,319.28
  4. Step 4: Simplify right side
    20,750.72x = 324,132,563.28
  5. Step 5: Solve for x
    x = 324,132,563.28/20,750.72
  6. Step 6: Final answer
    x = 15,620.30

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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.