Home / 20,884.15-28,815.58-12,382.06

Finding the Fourth Proportional to 20,884.15, 28,815.58 and 12,382.06

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Solution

The fourth proportional to 20,884.15, 28,815.58 and 12,382.06 is: 17,084.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.15 : 28,815.58 = 12,382.06 : x
  2. Step 2: Convert to fraction form
    20,884.15/28,815.58 = 12,382.06/x
  3. Step 3: Cross multiply
    20,884.15x = 28,815.58 × 12,382.06
  4. Step 4: Simplify right side
    20,884.15x = 356,796,240.49
  5. Step 5: Solve for x
    x = 356,796,240.49/20,884.15
  6. Step 6: Final answer
    x = 17,084.55

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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.