Home / 20,155.83-27,807.68-12,195.15

Finding the Fourth Proportional to 20,155.83, 27,807.68 and 12,195.15

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Solution

The fourth proportional to 20,155.83, 27,807.68 and 12,195.15 is: 16,824.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.83 : 27,807.68 = 12,195.15 : x
  2. Step 2: Convert to fraction form
    20,155.83/27,807.68 = 12,195.15/x
  3. Step 3: Cross multiply
    20,155.83x = 27,807.68 × 12,195.15
  4. Step 4: Simplify right side
    20,155.83x = 339,118,767.78
  5. Step 5: Solve for x
    x = 339,118,767.78/20,155.83
  6. Step 6: Final answer
    x = 16,824.85

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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.