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Finding the Fourth Proportional to 18,651.87, 25,741.40 and 13,927.95

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Solution

The fourth proportional to 18,651.87, 25,741.40 and 13,927.95 is: 19,221.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651.87 : 25,741.40 = 13,927.95 : x
  2. Step 2: Convert to fraction form
    18,651.87/25,741.40 = 13,927.95/x
  3. Step 3: Cross multiply
    18,651.87x = 25,741.40 × 13,927.95
  4. Step 4: Simplify right side
    18,651.87x = 358,524,862.49
  5. Step 5: Solve for x
    x = 358,524,862.49/18,651.87
  6. Step 6: Final answer
    x = 19,221.93

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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.