Home / 20,810.73-28,714.32-11,855.78

Finding the Fourth Proportional to 20,810.73, 28,714.32 and 11,855.78

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Solution

The fourth proportional to 20,810.73, 28,714.32 and 11,855.78 is: 16,358.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.73 : 28,714.32 = 11,855.78 : x
  2. Step 2: Convert to fraction form
    20,810.73/28,714.32 = 11,855.78/x
  3. Step 3: Cross multiply
    20,810.73x = 28,714.32 × 11,855.78
  4. Step 4: Simplify right side
    20,810.73x = 340,430,517.20
  5. Step 5: Solve for x
    x = 340,430,517.20/20,810.73
  6. Step 6: Final answer
    x = 16,358.41

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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.