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Finding the Fourth Proportional to 18,833.88, 28,233.54 and 8,439.96

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Solution

The fourth proportional to 18,833.88, 28,233.54 and 8,439.96 is: 12,652.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,833.88 : 28,233.54 = 8,439.96 : x
  2. Step 2: Convert to fraction form
    18,833.88/28,233.54 = 8,439.96/x
  3. Step 3: Cross multiply
    18,833.88x = 28,233.54 × 8,439.96
  4. Step 4: Simplify right side
    18,833.88x = 238,289,948.26
  5. Step 5: Solve for x
    x = 238,289,948.26/18,833.88
  6. Step 6: Final answer
    x = 12,652.20

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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.