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Finding the Fourth Proportional to 14,245.80, 19,659.09 and 7,872.82

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Solution

The fourth proportional to 14,245.80, 19,659.09 and 7,872.82 is: 10,864.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,245.80 : 19,659.09 = 7,872.82 : x
  2. Step 2: Convert to fraction form
    14,245.80/19,659.09 = 7,872.82/x
  3. Step 3: Cross multiply
    14,245.80x = 19,659.09 × 7,872.82
  4. Step 4: Simplify right side
    14,245.80x = 154,772,476.93
  5. Step 5: Solve for x
    x = 154,772,476.93/14,245.80
  6. Step 6: Final answer
    x = 10,864.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.