Home / 13,130.75-18,118.81-8,028.83

Finding the Fourth Proportional to 13,130.75, 18,118.81 and 8,028.83

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Solution

The fourth proportional to 13,130.75, 18,118.81 and 8,028.83 is: 11,078.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.75 : 18,118.81 = 8,028.83 : x
  2. Step 2: Convert to fraction form
    13,130.75/18,118.81 = 8,028.83/x
  3. Step 3: Cross multiply
    13,130.75x = 18,118.81 × 8,028.83
  4. Step 4: Simplify right side
    13,130.75x = 145,472,845.29
  5. Step 5: Solve for x
    x = 145,472,845.29/13,130.75
  6. Step 6: Final answer
    x = 11,078.79

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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.