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Finding the Fourth Proportional to 14,245.71, 19,658.97 and 7,872.72

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Solution

The fourth proportional to 14,245.71, 19,658.97 and 7,872.72 is: 10,864.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,245.71 : 19,658.97 = 7,872.72 : x
  2. Step 2: Convert to fraction form
    14,245.71/19,658.97 = 7,872.72/x
  3. Step 3: Cross multiply
    14,245.71x = 19,658.97 × 7,872.72
  4. Step 4: Simplify right side
    14,245.71x = 154,769,566.30
  5. Step 5: Solve for x
    x = 154,769,566.30/14,245.71
  6. Step 6: Final answer
    x = 10,864.29

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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.