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Finding the Fourth Proportional to 19,695.21, 29,528.97 and 7,213.61

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Solution

The fourth proportional to 19,695.21, 29,528.97 and 7,213.61 is: 10,815.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,695.21 : 29,528.97 = 7,213.61 : x
  2. Step 2: Convert to fraction form
    19,695.21/29,528.97 = 7,213.61/x
  3. Step 3: Cross multiply
    19,695.21x = 29,528.97 × 7,213.61
  4. Step 4: Simplify right side
    19,695.21x = 213,010,473.28
  5. Step 5: Solve for x
    x = 213,010,473.28/19,695.21
  6. Step 6: Final answer
    x = 10,815.35

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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.