Home / 8,120.58-12,170.88-6,470.34

Finding the Fourth Proportional to 8,120.58, 12,170.88 and 6,470.34

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Solution

The fourth proportional to 8,120.58, 12,170.88 and 6,470.34 is: 9,697.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.58 : 12,170.88 = 6,470.34 : x
  2. Step 2: Convert to fraction form
    8,120.58/12,170.88 = 6,470.34/x
  3. Step 3: Cross multiply
    8,120.58x = 12,170.88 × 6,470.34
  4. Step 4: Simplify right side
    8,120.58x = 78,749,731.70
  5. Step 5: Solve for x
    x = 78,749,731.70/8,120.58
  6. Step 6: Final answer
    x = 9,697.55

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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.