Home / 20,768.81-28,659.83-11,815.07

Finding the Fourth Proportional to 20,768.81, 28,659.83 and 11,815.07

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Solution

The fourth proportional to 20,768.81, 28,659.83 and 11,815.07 is: 16,304.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.81 : 28,659.83 = 11,815.07 : x
  2. Step 2: Convert to fraction form
    20,768.81/28,659.83 = 11,815.07/x
  3. Step 3: Cross multiply
    20,768.81x = 28,659.83 × 11,815.07
  4. Step 4: Simplify right side
    20,768.81x = 338,617,695.26
  5. Step 5: Solve for x
    x = 338,617,695.26/20,768.81
  6. Step 6: Final answer
    x = 16,304.15

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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.