Home / 19,850.81-27,387.11-12,191.45

Finding the Fourth Proportional to 19,850.81, 27,387.11 and 12,191.45

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Solution

The fourth proportional to 19,850.81, 27,387.11 and 12,191.45 is: 16,819.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,850.81 : 27,387.11 = 12,191.45 : x
  2. Step 2: Convert to fraction form
    19,850.81/27,387.11 = 12,191.45/x
  3. Step 3: Cross multiply
    19,850.81x = 27,387.11 × 12,191.45
  4. Step 4: Simplify right side
    19,850.81x = 333,888,475.75
  5. Step 5: Solve for x
    x = 333,888,475.75/19,850.81
  6. Step 6: Final answer
    x = 16,819.90

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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.