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Finding the Fourth Proportional to 18,643.91, 27,965.88 and 7,542.99

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Solution

The fourth proportional to 18,643.91, 27,965.88 and 7,542.99 is: 11,314.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.91 : 27,965.88 = 7,542.99 : x
  2. Step 2: Convert to fraction form
    18,643.91/27,965.88 = 7,542.99/x
  3. Step 3: Cross multiply
    18,643.91x = 27,965.88 × 7,542.99
  4. Step 4: Simplify right side
    18,643.91x = 210,946,353.18
  5. Step 5: Solve for x
    x = 210,946,353.18/18,643.91
  6. Step 6: Final answer
    x = 11,314.49

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Similar ratio
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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.