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Finding the Fourth Proportional to 12,155.95, 18,233.91 and 3,947.95

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Solution

The fourth proportional to 12,155.95, 18,233.91 and 3,947.95 is: 5,921.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,155.95 : 18,233.91 = 3,947.95 : x
  2. Step 2: Convert to fraction form
    12,155.95/18,233.91 = 3,947.95/x
  3. Step 3: Cross multiply
    12,155.95x = 18,233.91 × 3,947.95
  4. Step 4: Simplify right side
    12,155.95x = 71,986,473.81
  5. Step 5: Solve for x
    x = 71,986,473.81/12,155.95
  6. Step 6: Final answer
    x = 5,921.92

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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.