Home / 20,120.32-30,334.86-18,765.12

Finding the Fourth Proportional to 20,120.32, 30,334.86 and 18,765.12

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Solution

The fourth proportional to 20,120.32, 30,334.86 and 18,765.12 is: 28,291.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.32 : 30,334.86 = 18,765.12 : x
  2. Step 2: Convert to fraction form
    20,120.32/30,334.86 = 18,765.12/x
  3. Step 3: Cross multiply
    20,120.32x = 30,334.86 × 18,765.12
  4. Step 4: Simplify right side
    20,120.32x = 569,237,288.08
  5. Step 5: Solve for x
    x = 569,237,288.08/20,120.32
  6. Step 6: Final answer
    x = 28,291.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.