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Finding the Fourth Proportional to 18,885.67, 28,328.57 and 8,485.27

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Solution

The fourth proportional to 18,885.67, 28,328.57 and 8,485.27 is: 12,727.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885.67 : 28,328.57 = 8,485.27 : x
  2. Step 2: Convert to fraction form
    18,885.67/28,328.57 = 8,485.27/x
  3. Step 3: Cross multiply
    18,885.67x = 28,328.57 × 8,485.27
  4. Step 4: Simplify right side
    18,885.67x = 240,375,565.16
  5. Step 5: Solve for x
    x = 240,375,565.16/18,885.67
  6. Step 6: Final answer
    x = 12,727.93

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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.