Home / 8,120.11-12,155.50-5,200.47

Finding the Fourth Proportional to 8,120.11, 12,155.50 and 5,200.47

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Solution

The fourth proportional to 8,120.11, 12,155.50 and 5,200.47 is: 7,784.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.11 : 12,155.50 = 5,200.47 : x
  2. Step 2: Convert to fraction form
    8,120.11/12,155.50 = 5,200.47/x
  3. Step 3: Cross multiply
    8,120.11x = 12,155.50 × 5,200.47
  4. Step 4: Simplify right side
    8,120.11x = 63,214,313.09
  5. Step 5: Solve for x
    x = 63,214,313.09/8,120.11
  6. Step 6: Final answer
    x = 7,784.91

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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.