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Finding the Fourth Proportional to 18,054.99, 27,078.48 and 13,126.95

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Solution

The fourth proportional to 18,054.99, 27,078.48 and 13,126.95 is: 19,687.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,054.99 : 27,078.48 = 13,126.95 : x
  2. Step 2: Convert to fraction form
    18,054.99/27,078.48 = 13,126.95/x
  3. Step 3: Cross multiply
    18,054.99x = 27,078.48 × 13,126.95
  4. Step 4: Simplify right side
    18,054.99x = 355,457,853.04
  5. Step 5: Solve for x
    x = 355,457,853.04/18,054.99
  6. Step 6: Final answer
    x = 19,687.51

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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.