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Finding the Fourth Proportional to 18,783.57, 28,189.64 and 6,948.54

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Solution

The fourth proportional to 18,783.57, 28,189.64 and 6,948.54 is: 10,428.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.57 : 28,189.64 = 6,948.54 : x
  2. Step 2: Convert to fraction form
    18,783.57/28,189.64 = 6,948.54/x
  3. Step 3: Cross multiply
    18,783.57x = 28,189.64 × 6,948.54
  4. Step 4: Simplify right side
    18,783.57x = 195,876,858.50
  5. Step 5: Solve for x
    x = 195,876,858.50/18,783.57
  6. Step 6: Final answer
    x = 10,428.09

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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.