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Finding the Fourth Proportional to 12,156.95, 18,235.41 and 3,948.95

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Solution

The fourth proportional to 12,156.95, 18,235.41 and 3,948.95 is: 5,923.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.95 : 18,235.41 = 3,948.95 : x
  2. Step 2: Convert to fraction form
    12,156.95/18,235.41 = 3,948.95/x
  3. Step 3: Cross multiply
    12,156.95x = 18,235.41 × 3,948.95
  4. Step 4: Simplify right side
    12,156.95x = 72,010,631.14
  5. Step 5: Solve for x
    x = 72,010,631.14/12,156.95
  6. Step 6: Final answer
    x = 5,923.42

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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.