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Finding the Fourth Proportional to 18,428.58, 27,615.06 and 8,556.30

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Solution

The fourth proportional to 18,428.58, 27,615.06 and 8,556.30 is: 12,821.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.58 : 27,615.06 = 8,556.30 : x
  2. Step 2: Convert to fraction form
    18,428.58/27,615.06 = 8,556.30/x
  3. Step 3: Cross multiply
    18,428.58x = 27,615.06 × 8,556.30
  4. Step 4: Simplify right side
    18,428.58x = 236,282,737.88
  5. Step 5: Solve for x
    x = 236,282,737.88/18,428.58
  6. Step 6: Final answer
    x = 12,821.54

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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.