Home / 20,929.24-28,883.97-11,979.55

Finding the Fourth Proportional to 20,929.24, 28,883.97 and 11,979.55

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Solution

The fourth proportional to 20,929.24, 28,883.97 and 11,979.55 is: 16,532.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.24 : 28,883.97 = 11,979.55 : x
  2. Step 2: Convert to fraction form
    20,929.24/28,883.97 = 11,979.55/x
  3. Step 3: Cross multiply
    20,929.24x = 28,883.97 × 11,979.55
  4. Step 4: Simplify right side
    20,929.24x = 346,016,962.81
  5. Step 5: Solve for x
    x = 346,016,962.81/20,929.24
  6. Step 6: Final answer
    x = 16,532.71

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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.