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Finding the Fourth Proportional to 18,754.14, 25,891.95 and 11,690.13

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Solution

The fourth proportional to 18,754.14, 25,891.95 and 11,690.13 is: 16,139.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.14 : 25,891.95 = 11,690.13 : x
  2. Step 2: Convert to fraction form
    18,754.14/25,891.95 = 11,690.13/x
  3. Step 3: Cross multiply
    18,754.14x = 25,891.95 × 11,690.13
  4. Step 4: Simplify right side
    18,754.14x = 302,680,261.45
  5. Step 5: Solve for x
    x = 302,680,261.45/18,754.14
  6. Step 6: Final answer
    x = 16,139.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.