Home / 11,811.80-17,688.90-8,874.20

Finding the Fourth Proportional to 11,811.80, 17,688.90 and 8,874.20

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Solution

The fourth proportional to 11,811.80, 17,688.90 and 8,874.20 is: 13,289.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,811.80 : 17,688.90 = 8,874.20 : x
  2. Step 2: Convert to fraction form
    11,811.80/17,688.90 = 8,874.20/x
  3. Step 3: Cross multiply
    11,811.80x = 17,688.90 × 8,874.20
  4. Step 4: Simplify right side
    11,811.80x = 156,974,836.38
  5. Step 5: Solve for x
    x = 156,974,836.38/11,811.80
  6. Step 6: Final answer
    x = 13,289.66

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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.