Home / 18,128.56-25,015.05-10,170.76

Finding the Fourth Proportional to 18,128.56, 25,015.05 and 10,170.76

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Solution

The fourth proportional to 18,128.56, 25,015.05 and 10,170.76 is: 14,034.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.56 : 25,015.05 = 10,170.76 : x
  2. Step 2: Convert to fraction form
    18,128.56/25,015.05 = 10,170.76/x
  3. Step 3: Cross multiply
    18,128.56x = 25,015.05 × 10,170.76
  4. Step 4: Simplify right side
    18,128.56x = 254,422,069.94
  5. Step 5: Solve for x
    x = 254,422,069.94/18,128.56
  6. Step 6: Final answer
    x = 14,034.32

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Half scale
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Double scale
Find fourth proportional to 18,129.56, 25,016.43 and 10,171.76
Similar ratio
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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.