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Finding the Fourth Proportional to 18,429.80, 27,645.60 and 9,681.80

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Solution

The fourth proportional to 18,429.80, 27,645.60 and 9,681.80 is: 14,523.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,429.80 : 27,645.60 = 9,681.80 : x
  2. Step 2: Convert to fraction form
    18,429.80/27,645.60 = 9,681.80/x
  3. Step 3: Cross multiply
    18,429.80x = 27,645.60 × 9,681.80
  4. Step 4: Simplify right side
    18,429.80x = 267,659,170.08
  5. Step 5: Solve for x
    x = 267,659,170.08/18,429.80
  6. Step 6: Final answer
    x = 14,523.17

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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.