Home / 18,389.40-27,519.30-12,816.60

Finding the Fourth Proportional to 18,389.40, 27,519.30 and 12,816.60

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Solution

The fourth proportional to 18,389.40, 27,519.30 and 12,816.60 is: 19,179.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,389.40 : 27,519.30 = 12,816.60 : x
  2. Step 2: Convert to fraction form
    18,389.40/27,519.30 = 12,816.60/x
  3. Step 3: Cross multiply
    18,389.40x = 27,519.30 × 12,816.60
  4. Step 4: Simplify right side
    18,389.40x = 352,703,860.38
  5. Step 5: Solve for x
    x = 352,703,860.38/18,389.40
  6. Step 6: Final answer
    x = 19,179.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.