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Finding the Fourth Proportional to 18,518.67, 27,778.38 and 8,655.30

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Solution

The fourth proportional to 18,518.67, 27,778.38 and 8,655.30 is: 12,983.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,518.67 : 27,778.38 = 8,655.30 : x
  2. Step 2: Convert to fraction form
    18,518.67/27,778.38 = 8,655.30/x
  3. Step 3: Cross multiply
    18,518.67x = 27,778.38 × 8,655.30
  4. Step 4: Simplify right side
    18,518.67x = 240,430,212.41
  5. Step 5: Solve for x
    x = 240,430,212.41/18,518.67
  6. Step 6: Final answer
    x = 12,983.13

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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.