Home / 13,790.89-20,680.84-7,222.60

Finding the Fourth Proportional to 13,790.89, 20,680.84 and 7,222.60

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Solution

The fourth proportional to 13,790.89, 20,680.84 and 7,222.60 is: 10,831.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.89 : 20,680.84 = 7,222.60 : x
  2. Step 2: Convert to fraction form
    13,790.89/20,680.84 = 7,222.60/x
  3. Step 3: Cross multiply
    13,790.89x = 20,680.84 × 7,222.60
  4. Step 4: Simplify right side
    13,790.89x = 149,369,434.98
  5. Step 5: Solve for x
    x = 149,369,434.98/13,790.89
  6. Step 6: Final answer
    x = 10,831.02

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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.