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Finding the Fourth Proportional to 18,906.36, 28,359.54 and 5,055

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Solution

The fourth proportional to 18,906.36, 28,359.54 and 5,055 is: 7,582.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.36 : 28,359.54 = 5,055 : x
  2. Step 2: Convert to fraction form
    18,906.36/28,359.54 = 5,055/x
  3. Step 3: Cross multiply
    18,906.36x = 28,359.54 × 5,055
  4. Step 4: Simplify right side
    18,906.36x = 143,357,474.70
  5. Step 5: Solve for x
    x = 143,357,474.70/18,906.36
  6. Step 6: Final answer
    x = 7,582.50

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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.