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Finding the Fourth Proportional to 12,658.91, 18,972.96 and 9,528.83

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Solution

The fourth proportional to 12,658.91, 18,972.96 and 9,528.83 is: 14,281.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658.91 : 18,972.96 = 9,528.83 : x
  2. Step 2: Convert to fraction form
    12,658.91/18,972.96 = 9,528.83/x
  3. Step 3: Cross multiply
    12,658.91x = 18,972.96 × 9,528.83
  4. Step 4: Simplify right side
    12,658.91x = 180,790,015.57
  5. Step 5: Solve for x
    x = 180,790,015.57/12,658.91
  6. Step 6: Final answer
    x = 14,281.65

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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.