Home / 8,746.80-13,120.20-8,406.60

Finding the Fourth Proportional to 8,746.80, 13,120.20 and 8,406.60

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Solution

The fourth proportional to 8,746.80, 13,120.20 and 8,406.60 is: 12,609.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,746.80 : 13,120.20 = 8,406.60 : x
  2. Step 2: Convert to fraction form
    8,746.80/13,120.20 = 8,406.60/x
  3. Step 3: Cross multiply
    8,746.80x = 13,120.20 × 8,406.60
  4. Step 4: Simplify right side
    8,746.80x = 110,296,273.32
  5. Step 5: Solve for x
    x = 110,296,273.32/8,746.80
  6. Step 6: Final answer
    x = 12,609.90

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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.