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Finding the Fourth Proportional to 19,797.38, 29,690.88 and 7,320.98

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Solution

The fourth proportional to 19,797.38, 29,690.88 and 7,320.98 is: 10,979.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,797.38 : 29,690.88 = 7,320.98 : x
  2. Step 2: Convert to fraction form
    19,797.38/29,690.88 = 7,320.98/x
  3. Step 3: Cross multiply
    19,797.38x = 29,690.88 × 7,320.98
  4. Step 4: Simplify right side
    19,797.38x = 217,366,338.66
  5. Step 5: Solve for x
    x = 217,366,338.66/19,797.38
  6. Step 6: Final answer
    x = 10,979.55

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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.