Home / 18,816.36-28,215.58-7,122.12

Finding the Fourth Proportional to 18,816.36, 28,215.58 and 7,122.12

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Solution

The fourth proportional to 18,816.36, 28,215.58 and 7,122.12 is: 10,679.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.36 : 28,215.58 = 7,122.12 : x
  2. Step 2: Convert to fraction form
    18,816.36/28,215.58 = 7,122.12/x
  3. Step 3: Cross multiply
    18,816.36x = 28,215.58 × 7,122.12
  4. Step 4: Simplify right side
    18,816.36x = 200,954,746.63
  5. Step 5: Solve for x
    x = 200,954,746.63/18,816.36
  6. Step 6: Final answer
    x = 10,679.79

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Double scale
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Similar ratio
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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.