Home / 12,125.79-18,188.67-3,806.55

Finding the Fourth Proportional to 12,125.79, 18,188.67 and 3,806.55

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Solution

The fourth proportional to 12,125.79, 18,188.67 and 3,806.55 is: 5,709.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,125.79 : 18,188.67 = 3,806.55 : x
  2. Step 2: Convert to fraction form
    12,125.79/18,188.67 = 3,806.55/x
  3. Step 3: Cross multiply
    12,125.79x = 18,188.67 × 3,806.55
  4. Step 4: Simplify right side
    12,125.79x = 69,236,081.79
  5. Step 5: Solve for x
    x = 69,236,081.79/12,125.79
  6. Step 6: Final answer
    x = 5,709.82

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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.