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Finding the Fourth Proportional to 18,858.60, 28,283.16 and 7,768.38

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Solution

The fourth proportional to 18,858.60, 28,283.16 and 7,768.38 is: 11,650.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.60 : 28,283.16 = 7,768.38 : x
  2. Step 2: Convert to fraction form
    18,858.60/28,283.16 = 7,768.38/x
  3. Step 3: Cross multiply
    18,858.60x = 28,283.16 × 7,768.38
  4. Step 4: Simplify right side
    18,858.60x = 219,714,334.48
  5. Step 5: Solve for x
    x = 219,714,334.48/18,858.60
  6. Step 6: Final answer
    x = 11,650.62

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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.