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Finding the Fourth Proportional to 19,340.40, 29,021.40 and 8,245.20

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Solution

The fourth proportional to 19,340.40, 29,021.40 and 8,245.20 is: 12,372.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,340.40 : 29,021.40 = 8,245.20 : x
  2. Step 2: Convert to fraction form
    19,340.40/29,021.40 = 8,245.20/x
  3. Step 3: Cross multiply
    19,340.40x = 29,021.40 × 8,245.20
  4. Step 4: Simplify right side
    19,340.40x = 239,287,247.28
  5. Step 5: Solve for x
    x = 239,287,247.28/19,340.40
  6. Step 6: Final answer
    x = 12,372.40

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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.