Home / 20,780.64-28,677.26-12,285.83

Finding the Fourth Proportional to 20,780.64, 28,677.26 and 12,285.83

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Solution

The fourth proportional to 20,780.64, 28,677.26 and 12,285.83 is: 16,954.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.64 : 28,677.26 = 12,285.83 : x
  2. Step 2: Convert to fraction form
    20,780.64/28,677.26 = 12,285.83/x
  3. Step 3: Cross multiply
    20,780.64x = 28,677.26 × 12,285.83
  4. Step 4: Simplify right side
    20,780.64x = 352,323,736.41
  5. Step 5: Solve for x
    x = 352,323,736.41/20,780.64
  6. Step 6: Final answer
    x = 16,954.42

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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.