Home / 20,240.40-27,920.52-11,855.28

Finding the Fourth Proportional to 20,240.40, 27,920.52 and 11,855.28

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Solution

The fourth proportional to 20,240.40, 27,920.52 and 11,855.28 is: 16,353.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.40 : 27,920.52 = 11,855.28 : x
  2. Step 2: Convert to fraction form
    20,240.40/27,920.52 = 11,855.28/x
  3. Step 3: Cross multiply
    20,240.40x = 27,920.52 × 11,855.28
  4. Step 4: Simplify right side
    20,240.40x = 331,005,582.35
  5. Step 5: Solve for x
    x = 331,005,582.35/20,240.40
  6. Step 6: Final answer
    x = 16,353.71

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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.