Home / 8,120.76-11,208.36-5,134.68

Finding the Fourth Proportional to 8,120.76, 11,208.36 and 5,134.68

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Solution

The fourth proportional to 8,120.76, 11,208.36 and 5,134.68 is: 7,086.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.76 : 11,208.36 = 5,134.68 : x
  2. Step 2: Convert to fraction form
    8,120.76/11,208.36 = 5,134.68/x
  3. Step 3: Cross multiply
    8,120.76x = 11,208.36 × 5,134.68
  4. Step 4: Simplify right side
    8,120.76x = 57,551,341.92
  5. Step 5: Solve for x
    x = 57,551,341.92/8,120.76
  6. Step 6: Final answer
    x = 7,086.94

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.