Home / 20,380.32-28,125.15-11,305.62

Finding the Fourth Proportional to 20,380.32, 28,125.15 and 11,305.62

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Solution

The fourth proportional to 20,380.32, 28,125.15 and 11,305.62 is: 15,601.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.32 : 28,125.15 = 11,305.62 : x
  2. Step 2: Convert to fraction form
    20,380.32/28,125.15 = 11,305.62/x
  3. Step 3: Cross multiply
    20,380.32x = 28,125.15 × 11,305.62
  4. Step 4: Simplify right side
    20,380.32x = 317,972,258.34
  5. Step 5: Solve for x
    x = 317,972,258.34/20,380.32
  6. Step 6: Final answer
    x = 15,601.93

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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.