Home / 18,129.16-25,019.46-12,170.76

Finding the Fourth Proportional to 18,129.16, 25,019.46 and 12,170.76

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Solution

The fourth proportional to 18,129.16, 25,019.46 and 12,170.76 is: 16,796.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129.16 : 25,019.46 = 12,170.76 : x
  2. Step 2: Convert to fraction form
    18,129.16/25,019.46 = 12,170.76/x
  3. Step 3: Cross multiply
    18,129.16x = 25,019.46 × 12,170.76
  4. Step 4: Simplify right side
    18,129.16x = 304,505,842.99
  5. Step 5: Solve for x
    x = 304,505,842.99/18,129.16
  6. Step 6: Final answer
    x = 16,796.47

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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.