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Finding the Fourth Proportional to 18,950.64, 28,449.48 and 12,630.96

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Solution

The fourth proportional to 18,950.64, 28,449.48 and 12,630.96 is: 18,962.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,950.64 : 28,449.48 = 12,630.96 : x
  2. Step 2: Convert to fraction form
    18,950.64/28,449.48 = 12,630.96/x
  3. Step 3: Cross multiply
    18,950.64x = 28,449.48 × 12,630.96
  4. Step 4: Simplify right side
    18,950.64x = 359,344,243.90
  5. Step 5: Solve for x
    x = 359,344,243.90/18,950.64
  6. Step 6: Final answer
    x = 18,962.12

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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.