Home / 12,156.75-18,235.13-3,948.75

Finding the Fourth Proportional to 12,156.75, 18,235.13 and 3,948.75

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Solution

The fourth proportional to 12,156.75, 18,235.13 and 3,948.75 is: 5,923.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.75 : 18,235.13 = 3,948.75 : x
  2. Step 2: Convert to fraction form
    12,156.75/18,235.13 = 3,948.75/x
  3. Step 3: Cross multiply
    12,156.75x = 18,235.13 × 3,948.75
  4. Step 4: Simplify right side
    12,156.75x = 72,005,949.84
  5. Step 5: Solve for x
    x = 72,005,949.84/12,156.75
  6. Step 6: Final answer
    x = 5,923.13

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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.