Home / 12,154.80-18,231.12-5,912.40

Finding the Fourth Proportional to 12,154.80, 18,231.12 and 5,912.40

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Solution

The fourth proportional to 12,154.80, 18,231.12 and 5,912.40 is: 8,868.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,154.80 : 18,231.12 = 5,912.40 : x
  2. Step 2: Convert to fraction form
    12,154.80/18,231.12 = 5,912.40/x
  3. Step 3: Cross multiply
    12,154.80x = 18,231.12 × 5,912.40
  4. Step 4: Simplify right side
    12,154.80x = 107,789,673.89
  5. Step 5: Solve for x
    x = 107,789,673.89/12,154.80
  6. Step 6: Final answer
    x = 8,868.07

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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.