Home / 20,568.36-28,384.38-12,185.40

Finding the Fourth Proportional to 20,568.36, 28,384.38 and 12,185.40

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Solution

The fourth proportional to 20,568.36, 28,384.38 and 12,185.40 is: 16,815.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,568.36 : 28,384.38 = 12,185.40 : x
  2. Step 2: Convert to fraction form
    20,568.36/28,384.38 = 12,185.40/x
  3. Step 3: Cross multiply
    20,568.36x = 28,384.38 × 12,185.40
  4. Step 4: Simplify right side
    20,568.36x = 345,875,024.05
  5. Step 5: Solve for x
    x = 345,875,024.05/20,568.36
  6. Step 6: Final answer
    x = 16,815.88

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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.