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Finding the Fourth Proportional to 18,219.30, 27,328.95 and 10,422.65

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Solution

The fourth proportional to 18,219.30, 27,328.95 and 10,422.65 is: 15,633.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,219.30 : 27,328.95 = 10,422.65 : x
  2. Step 2: Convert to fraction form
    18,219.30/27,328.95 = 10,422.65/x
  3. Step 3: Cross multiply
    18,219.30x = 27,328.95 × 10,422.65
  4. Step 4: Simplify right side
    18,219.30x = 284,839,944.07
  5. Step 5: Solve for x
    x = 284,839,944.07/18,219.30
  6. Step 6: Final answer
    x = 15,633.97

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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.