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Finding the Fourth Proportional to 18,762.15, 28,132.83 and 7,676.62

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Solution

The fourth proportional to 18,762.15, 28,132.83 and 7,676.62 is: 11,510.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.15 : 28,132.83 = 7,676.62 : x
  2. Step 2: Convert to fraction form
    18,762.15/28,132.83 = 7,676.62/x
  3. Step 3: Cross multiply
    18,762.15x = 28,132.83 × 7,676.62
  4. Step 4: Simplify right side
    18,762.15x = 215,965,045.43
  5. Step 5: Solve for x
    x = 215,965,045.43/18,762.15
  6. Step 6: Final answer
    x = 11,510.68

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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.