Home / 13,861.47-20,806.22-12,290.25

Finding the Fourth Proportional to 13,861.47, 20,806.22 and 12,290.25

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Solution

The fourth proportional to 13,861.47, 20,806.22 and 12,290.25 is: 18,447.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,861.47 : 20,806.22 = 12,290.25 : x
  2. Step 2: Convert to fraction form
    13,861.47/20,806.22 = 12,290.25/x
  3. Step 3: Cross multiply
    13,861.47x = 20,806.22 × 12,290.25
  4. Step 4: Simplify right side
    13,861.47x = 255,713,479.87
  5. Step 5: Solve for x
    x = 255,713,479.87/13,861.47
  6. Step 6: Final answer
    x = 18,447.80

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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.