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Finding the Fourth Proportional to 18,983.52, 28,455 and 9,630.42

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Solution

The fourth proportional to 18,983.52, 28,455 and 9,630.42 is: 14,435.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,983.52 : 28,455 = 9,630.42 : x
  2. Step 2: Convert to fraction form
    18,983.52/28,455 = 9,630.42/x
  3. Step 3: Cross multiply
    18,983.52x = 28,455 × 9,630.42
  4. Step 4: Simplify right side
    18,983.52x = 274,033,601.10
  5. Step 5: Solve for x
    x = 274,033,601.10/18,983.52
  6. Step 6: Final answer
    x = 14,435.34

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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.