Home / 20,929.78-28,884.52-11,498.44

Finding the Fourth Proportional to 20,929.78, 28,884.52 and 11,498.44

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Solution

The fourth proportional to 20,929.78, 28,884.52 and 11,498.44 is: 15,868.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.78 : 28,884.52 = 11,498.44 : x
  2. Step 2: Convert to fraction form
    20,929.78/28,884.52 = 11,498.44/x
  3. Step 3: Cross multiply
    20,929.78x = 28,884.52 × 11,498.44
  4. Step 4: Simplify right side
    20,929.78x = 332,126,920.15
  5. Step 5: Solve for x
    x = 332,126,920.15/20,929.78
  6. Step 6: Final answer
    x = 15,868.63

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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.