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Finding the Fourth Proportional to 18,221.88, 27,267.80 and 13,230.04

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Solution

The fourth proportional to 18,221.88, 27,267.80 and 13,230.04 is: 19,797.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,221.88 : 27,267.80 = 13,230.04 : x
  2. Step 2: Convert to fraction form
    18,221.88/27,267.80 = 13,230.04/x
  3. Step 3: Cross multiply
    18,221.88x = 27,267.80 × 13,230.04
  4. Step 4: Simplify right side
    18,221.88x = 360,754,084.71
  5. Step 5: Solve for x
    x = 360,754,084.71/18,221.88
  6. Step 6: Final answer
    x = 19,797.85

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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.