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Finding the Fourth Proportional to 18,506.40, 27,743.40 and 11,113.80

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Solution

The fourth proportional to 18,506.40, 27,743.40 and 11,113.80 is: 16,660.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,506.40 : 27,743.40 = 11,113.80 : x
  2. Step 2: Convert to fraction form
    18,506.40/27,743.40 = 11,113.80/x
  3. Step 3: Cross multiply
    18,506.40x = 27,743.40 × 11,113.80
  4. Step 4: Simplify right side
    18,506.40x = 308,334,598.92
  5. Step 5: Solve for x
    x = 308,334,598.92/18,506.40
  6. Step 6: Final answer
    x = 16,660.97

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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.