Home / 20,620.94-28,455.14-12,123.32

Finding the Fourth Proportional to 20,620.94, 28,455.14 and 12,123.32

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Solution

The fourth proportional to 20,620.94, 28,455.14 and 12,123.32 is: 16,729.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.94 : 28,455.14 = 12,123.32 : x
  2. Step 2: Convert to fraction form
    20,620.94/28,455.14 = 12,123.32/x
  3. Step 3: Cross multiply
    20,620.94x = 28,455.14 × 12,123.32
  4. Step 4: Simplify right side
    20,620.94x = 344,970,767.86
  5. Step 5: Solve for x
    x = 344,970,767.86/20,620.94
  6. Step 6: Final answer
    x = 16,729.15

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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.