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Finding the Fourth Proportional to 19,700.30, 29,550.84 and 10,990.64

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Solution

The fourth proportional to 19,700.30, 29,550.84 and 10,990.64 is: 16,486.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,700.30 : 29,550.84 = 10,990.64 : x
  2. Step 2: Convert to fraction form
    19,700.30/29,550.84 = 10,990.64/x
  3. Step 3: Cross multiply
    19,700.30x = 29,550.84 × 10,990.64
  4. Step 4: Simplify right side
    19,700.30x = 324,782,644.14
  5. Step 5: Solve for x
    x = 324,782,644.14/19,700.30
  6. Step 6: Final answer
    x = 16,486.18

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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.