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Finding the Fourth Proportional to 18,086.80, 27,130.20 and 7,697.20

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Solution

The fourth proportional to 18,086.80, 27,130.20 and 7,697.20 is: 11,545.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,086.80 : 27,130.20 = 7,697.20 : x
  2. Step 2: Convert to fraction form
    18,086.80/27,130.20 = 7,697.20/x
  3. Step 3: Cross multiply
    18,086.80x = 27,130.20 × 7,697.20
  4. Step 4: Simplify right side
    18,086.80x = 208,826,575.44
  5. Step 5: Solve for x
    x = 208,826,575.44/18,086.80
  6. Step 6: Final answer
    x = 11,545.80

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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.