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Finding the Fourth Proportional to 18,555.20, 27,784.20 and 14,634.80

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Solution

The fourth proportional to 18,555.20, 27,784.20 and 14,634.80 is: 21,913.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,555.20 : 27,784.20 = 14,634.80 : x
  2. Step 2: Convert to fraction form
    18,555.20/27,784.20 = 14,634.80/x
  3. Step 3: Cross multiply
    18,555.20x = 27,784.20 × 14,634.80
  4. Step 4: Simplify right side
    18,555.20x = 406,616,210.16
  5. Step 5: Solve for x
    x = 406,616,210.16/18,555.20
  6. Step 6: Final answer
    x = 21,913.87

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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.