Home / 13,790.92-20,660.30-8,151.72

Finding the Fourth Proportional to 13,790.92, 20,660.30 and 8,151.72

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Solution

The fourth proportional to 13,790.92, 20,660.30 and 8,151.72 is: 12,212.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.92 : 20,660.30 = 8,151.72 : x
  2. Step 2: Convert to fraction form
    13,790.92/20,660.30 = 8,151.72/x
  3. Step 3: Cross multiply
    13,790.92x = 20,660.30 × 8,151.72
  4. Step 4: Simplify right side
    13,790.92x = 168,416,980.72
  5. Step 5: Solve for x
    x = 168,416,980.72/13,790.92
  6. Step 6: Final answer
    x = 12,212.16

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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.