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Finding the Fourth Proportional to 12,782.12, 17,639.94 and 7,193

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Solution

The fourth proportional to 12,782.12, 17,639.94 and 7,193 is: 9,926.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,782.12 : 17,639.94 = 7,193 : x
  2. Step 2: Convert to fraction form
    12,782.12/17,639.94 = 7,193/x
  3. Step 3: Cross multiply
    12,782.12x = 17,639.94 × 7,193
  4. Step 4: Simplify right side
    12,782.12x = 126,884,088.42
  5. Step 5: Solve for x
    x = 126,884,088.42/12,782.12
  6. Step 6: Final answer
    x = 9,926.69

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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.