Home / 20,393.46-28,141.32-11,439.72

Finding the Fourth Proportional to 20,393.46, 28,141.32 and 11,439.72

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Solution

The fourth proportional to 20,393.46, 28,141.32 and 11,439.72 is: 15,785.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.46 : 28,141.32 = 11,439.72 : x
  2. Step 2: Convert to fraction form
    20,393.46/28,141.32 = 11,439.72/x
  3. Step 3: Cross multiply
    20,393.46x = 28,141.32 × 11,439.72
  4. Step 4: Simplify right side
    20,393.46x = 321,928,821.23
  5. Step 5: Solve for x
    x = 321,928,821.23/20,393.46
  6. Step 6: Final answer
    x = 15,785.89

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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.