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Finding the Fourth Proportional to 18,535.80, 27,803.70 and 11,969.40

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Solution

The fourth proportional to 18,535.80, 27,803.70 and 11,969.40 is: 17,954.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,535.80 : 27,803.70 = 11,969.40 : x
  2. Step 2: Convert to fraction form
    18,535.80/27,803.70 = 11,969.40/x
  3. Step 3: Cross multiply
    18,535.80x = 27,803.70 × 11,969.40
  4. Step 4: Simplify right side
    18,535.80x = 332,793,606.78
  5. Step 5: Solve for x
    x = 332,793,606.78/18,535.80
  6. Step 6: Final answer
    x = 17,954.10

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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.