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Finding the Fourth Proportional to 18,029.20, 27,043.80 and 11,808.40

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Solution

The fourth proportional to 18,029.20, 27,043.80 and 11,808.40 is: 17,712.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,029.20 : 27,043.80 = 11,808.40 : x
  2. Step 2: Convert to fraction form
    18,029.20/27,043.80 = 11,808.40/x
  3. Step 3: Cross multiply
    18,029.20x = 27,043.80 × 11,808.40
  4. Step 4: Simplify right side
    18,029.20x = 319,344,007.92
  5. Step 5: Solve for x
    x = 319,344,007.92/18,029.20
  6. Step 6: Final answer
    x = 17,712.60

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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.