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Finding the Fourth Proportional to 12,630.40, 18,942.84 and 7,354.24

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Solution

The fourth proportional to 12,630.40, 18,942.84 and 7,354.24 is: 11,029.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,630.40 : 18,942.84 = 7,354.24 : x
  2. Step 2: Convert to fraction form
    12,630.40/18,942.84 = 7,354.24/x
  3. Step 3: Cross multiply
    12,630.40x = 18,942.84 × 7,354.24
  4. Step 4: Simplify right side
    12,630.40x = 139,310,191.64
  5. Step 5: Solve for x
    x = 139,310,191.64/12,630.40
  6. Step 6: Final answer
    x = 11,029.75

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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.