Home / 20,238.11-27,928.47-11,285.72

Finding the Fourth Proportional to 20,238.11, 27,928.47 and 11,285.72

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Solution

The fourth proportional to 20,238.11, 27,928.47 and 11,285.72 is: 15,574.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,238.11 : 27,928.47 = 11,285.72 : x
  2. Step 2: Convert to fraction form
    20,238.11/27,928.47 = 11,285.72/x
  3. Step 3: Cross multiply
    20,238.11x = 27,928.47 × 11,285.72
  4. Step 4: Simplify right side
    20,238.11x = 315,192,892.45
  5. Step 5: Solve for x
    x = 315,192,892.45/20,238.11
  6. Step 6: Final answer
    x = 15,574.23

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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.