Home / 12,139.68-18,195.85-6,199.95

Finding the Fourth Proportional to 12,139.68, 18,195.85 and 6,199.95

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Solution

The fourth proportional to 12,139.68, 18,195.85 and 6,199.95 is: 9,292.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.68 : 18,195.85 = 6,199.95 : x
  2. Step 2: Convert to fraction form
    12,139.68/18,195.85 = 6,199.95/x
  3. Step 3: Cross multiply
    12,139.68x = 18,195.85 × 6,199.95
  4. Step 4: Simplify right side
    12,139.68x = 112,813,360.21
  5. Step 5: Solve for x
    x = 112,813,360.21/12,139.68
  6. Step 6: Final answer
    x = 9,292.94

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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.