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Finding the Fourth Proportional to 19,822.72, 29,727.88 and 7,170.88

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Solution

The fourth proportional to 19,822.72, 29,727.88 and 7,170.88 is: 10,754.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,822.72 : 29,727.88 = 7,170.88 : x
  2. Step 2: Convert to fraction form
    19,822.72/29,727.88 = 7,170.88/x
  3. Step 3: Cross multiply
    19,822.72x = 29,727.88 × 7,170.88
  4. Step 4: Simplify right side
    19,822.72x = 213,175,060.13
  5. Step 5: Solve for x
    x = 213,175,060.13/19,822.72
  6. Step 6: Final answer
    x = 10,754.08

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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.