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Finding the Fourth Proportional to 19,796.40, 29,589.30 and 13,964.40

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Solution

The fourth proportional to 19,796.40, 29,589.30 and 13,964.40 is: 20,872.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,796.40 : 29,589.30 = 13,964.40 : x
  2. Step 2: Convert to fraction form
    19,796.40/29,589.30 = 13,964.40/x
  3. Step 3: Cross multiply
    19,796.40x = 29,589.30 × 13,964.40
  4. Step 4: Simplify right side
    19,796.40x = 413,196,820.92
  5. Step 5: Solve for x
    x = 413,196,820.92/19,796.40
  6. Step 6: Final answer
    x = 20,872.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.