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Finding the Fourth Proportional to 19,630.40, 29,447.40 and 7,941.20

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Solution

The fourth proportional to 19,630.40, 29,447.40 and 7,941.20 is: 11,912.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,630.40 : 29,447.40 = 7,941.20 : x
  2. Step 2: Convert to fraction form
    19,630.40/29,447.40 = 7,941.20/x
  3. Step 3: Cross multiply
    19,630.40x = 29,447.40 × 7,941.20
  4. Step 4: Simplify right side
    19,630.40x = 233,847,692.88
  5. Step 5: Solve for x
    x = 233,847,692.88/19,630.40
  6. Step 6: Final answer
    x = 11,912.53

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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.